yacht anchor shackle

• Anchor & Dock

Anchor Chain & Shackles

Anchorlift Anchor Turner Kit

Anchorlift Anchor Turner Kit The Anchorlift Anchor Turner is a must have for all boat owners to remove the hassle of parking your anchor. This patent pending turner will help your anchor twist around to correctly sit in the bow roller every time. The...

Gen3 Marine Stainless Steel Anchor Swivel

Gen3 Marine Stainless Steel Anchor Swivel Keep your rope from becoming twisted up and prevent snagging with the Gen3 Marine Stainless Steel Anchor Swivel. Made from corrosion resistant stainless steel, this piece of equipment can rotate a full 360...

Gen3 Marine Stainless Steel Anchor Shackle

Gen3 Marine Stainless Steel Anchor Shackle The Gen3 Marine Stainless Steel Anchor Shackle features a corrosion resistant stainless steel making it durable in the harsh marine environment. In addition, its rounded shape makes it great anchoring and ideal...

Gen3 Marine Galvanized Anchor Shackle

Gen3 Marine Galvanized Anchor Shackle With its round shape and galvanized finish, Gen3’s Galvanized Anchor Shackle provides strong and reliable connections between your anchor, lean chain, and anchor line. The galvanized shackle features a...

Gen3 Marine Stainless Steel Anchor Chain & Shackle Kit

Gen3 Marine Stainless Steel Anchor Chain & Shackle Kit Gen3’s Stainless Steel Anchor Chain is made with 316 Stainless Steel, giving it a greater breaking strength than chains from other materials. Gen3 Marine’s anchor chain helps to...

Gen3 Marine Anchor Chain & Shackle Kit

Gen3 Marine Anchor Chain & Shackle Kit Strengthen your anchor hold by adding the Gen3 Marine Anchor Chain & Shackle Kit to your anchor line. Each size of the hot dipped galvanized anchor chains comes with two anchor shackles. Not only does...

Whitecap Vinyl Coated Galvanized Anchor Chain

Whitecap Vinyl-Coated Galvanized Steel Anchor Chain Protect your deck and gunwale with Whitecap Vinyl-Coated Anchor Chain. This heavy-duty, fully vinyl-coated galvanized chain eliminates fouled anchor lines and strengthens anchor hold. Whitecap's anchor...

Whitecap Stainless Steel Anchor Chain

Whitecap Stainless Steel Anchor Chain Whitecap Stainless Steel Anchor Chain is constructed of heavy-duty 316 stainless steel. This anchor chain eliminates fouled anchor lines and strengthens anchor hold. Whitecap stainless steel anchor chain is...

Whitecap Heavy-Duty Galvanized Anchor Chain

Whitecap Heavy-Duty Galvanized Anchor Chain Whitecap Heavy-Duty Galvanized Anchor Chain is constructed of hot dipped galvanized steel and includes triangle links on each end. This anchor chain protects deck and gunwales, eliminates fouled anchor lines,...

Whitecap Stainless Steel Eye to Eye Swivel

Whitecap Stainless Steel Eye to Eye Swivel This Whitecap Eye to Eye Swivel is constructed of durable 316 stainless steel. Available in multiple sizes. Specifications:     Size   Overall Length   Width Inside...

AnchorLift Stainless Steel Anchor Swivel

AnchorLift Stainless Steel Anchor Swivel The AnchorLift Stainless Steel Anchor Swivel attaches to the anchor shank to ensure the rode chain doesn't get twisted. AnchorLift swivels have an exclusive bronze washer between the two moving parts, which...

Lewmar Stainless Anchor Swivel

Lewmar Stainless Anchor Swivel Lewmar Anchor Swivel is made from 316 Stainless Steel and can swivel 360 degrees. Attach the swivel between the anchor and the chain, allowing the rope to swivel instead of twisting up. Models...

Greenfield PVC Coated Anchor Chain - Yellow

Greenfield Products PVC Coated Anchor Chain - Yellow Greenfield's unique, specially formulated, highly elastic PVC coating stretches to allow chain to bend and coil easy. Anchor chain is essential for safe anchoring, providing weight between the anchor...

Greenfield PVC Coated Anchor Chain - White

Greenfield Products PVC Coated Anchor Chain - White Greenfield's unique, specially formulated, highly elastic PVC coating stretches to allow chain to bend and coil easy. Anchor chain is essential for safe anchoring, providing weight between the anchor...

Greenfield PVC Coated Anchor Chain - Red

Greenfield Products PVC Coated Anchor Chain - Red Greenfield's unique, specially formulated, highly elastic PVC coating stretches to allow chain to bend and coil easy. Anchor chain is essential for safe anchoring, providing weight between the anchor and...

Greenfield PVC Coated Anchor Chain - Royal Blue

Greenfield Products PVC Coated Anchor Chain - Royal Blue Greenfield's unique, specially formulated, highly elastic PVC coating stretches to allow chain to bend and coil easy. Anchor chain is essential for safe anchoring, providing weight between the...

Greenfield PVC Coated Anchor Chain - Black

Greenfield PVC Coated Anchor Chain - Black Greenfield's unique, specially formulated, highly elastic PVC coating stretches to allow chain to bend and coil easy. Anchor chain is essential for safe anchoring, providing weight between the anchor and rode...

Whitecap Black Nylon Rope Thimble

Whitecap Industries Black Nylon Rope Thimble Black Nylon Available in 3/8" and 1/2" 

Sea Dog Quick Link

Sea-Dog Quick Link   Electro-Galvanized Steel Threaded Stock Captive nuts screw off one end to open, back on to close Skin packed Part Number A B C D E B.S. (lb...

Galvanized Anchor Chain And Shackles

Tie Down Engineering Galvanized Anchor Chain And Shackles Make anchoring a breeze by adding a length of chain to your anchor line. Includes two anchor shackles. Specifications:   Part...

Anchor Chain & Anchor Shackles

Whether you are anchoring for a quick swim or staying for the night, make sure your vessel has the right anchoring supplies to get the job done. Wholesale Marine carries an extensive line of chains and shackles from  Sea Dog ,  Lewmar ,  Greenfield ,  Whitecap , and more.

Anchor chain is used in combination with anchor line, shackles, and swivels to ensure safe anchoring. The chain helps keep the anchor in the correct setting position for a stronger hold. It also helps prevent chafing and abrasion, which can occur when rope is attached directly to the anchor.

Anchor Supplies for Every Vessel

Anchor chains come in a variety of materials, sizes, and lengths for various anchoring situations. Greenfield offers  PVC-coated Anchor chain  in a variety of colors. The specially formulated PVC coating allows the chain to bend and coil easily.

Whitecap’s Stainless Steel Anchor Chain is a durable, corrosion-resistant option for saltwater boaters. It is constructed of 316 stainless steel and is available in a variety of sizes.

Anchor shackles and swivels are essential for connecting your chain to your anchor and line. Screw pin shackles are available in stainless or galvanized steel. Anchor swivels are an alternative to shackles that allow rotation to prevent your line and chain from snagging and getting twisted up.

Purchasing the right anchoring supplies with enough strength and durability is essential. Regularly inspecting this equipment can help avoid costly repairs from anchors breaking or not holding your vessel.

Have questions about your anchoring system? Contact our customer service team of boating enthusiasts at 877-388-2628 Monday through Friday from 9:00 AM until 6:00 PM. Be sure to ask about our Captain’s Loyalty Program for additional savings on future purchases.

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Mooring Warps and Mooring Lines

• LIROS 3 Strand Polyester Mooring Warps
• LIROS Green Wave 3 Strand Mooring Warps
• LIROS Braided Dockline Mooring Warps
• LIROS Handy Elastic Mooring Warps
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• 50 metre / 100 metre Rates - Mooring

Mooring Accessories

• Mooring Compensators

Mooring Strops and Bridles

• V shape Mooring Bridles
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Mooring Assistance

• Coastline Bow Thruster Accessories
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• Majoni Fenders
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Mooring Components

• Mooring Swivels
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Mooring Information

• Mooring Warps Size Guide
• Mooring Lines - LIROS Recommended Diameters
• Mooring Rope Selection Guide
• Mooring Warp Length and Configuration Guide
• How to estimate the length of a single line Mooring Strop
• Mooring Ropes - Break Load Chart
• Mooring Compensator Advisory
• Rope Cockling Information
• Fender Size Guide
• Majoni Fender Guide
• Polyform Norway Fender Inflation Guide
• More Article and Guides >

Anchor Warps Spliced to Chain

• LIROS 3 Strand Nylon Spliced to Chain
• LIROS Anchorplait Nylon Spliced to Chain

Anchor Warps

• LIROS Anchorplait Nylon Anchor Warps
• LIROS 3 Strand Nylon Anchor Warps
• Leaded Anchor Warp
• Drogue Warps and Bridles
• 50 / 100 metre Rates - Anchoring
• Aluminium Anchors
• Galvanised Anchors
• Stainless Steel Anchors

Calibrated Anchor Chain

• Cromox G6 Stainless Steel Chain
• G4 Calibrated Stainless Steel Anchor Chain
• Lofrans Grade 40
• MF DAMS Grade 70
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• Titan Grade 43
• Lewmar Windlasses
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• Windlass Accessories and Spares

Chain Snubbers

• Chain Hooks, Grabs and Grippers
• Chain Snubbing Bridles
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Anchoring Accessories

• Anchor Connectors
• Anchor Trip Hooks and Rings

Anchoring Shackles

• Bow Rollers and Fittings
• Chain and Anchor Stoppers
• Chain Links and Markers

Anchoring Information

• How To Choose A Main Anchor
• Anchoring System Assessment
• Anchor Chain and Rope Size Guide
• The Jimmy Green Guide to the Best Anchor Ropes
• What Size Anchor Do I Need?
• Anchor to Chain Connection Guide
• How to Choose Your Anchor Chain
• How to Establish the Correct Anchor Chain Calibration?
• Calibrated Anchor Chain - General Information
• Calibrated Anchor Chain Quality Control
• Calibrated Chain - Break Load and Weight Guide
• Galvanising - Managing Performance and Endurance expectation
• Can Galvanised Steel be used with Stainless Steel?
• Windlass Selection Guide
• More Articles and Guides

Stainless Steel Wire Rigging and Wire Rope

• 1x19 Wire Rigging
• 50 / 100 metre Rates - Wire and Fibre
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Dinghy Rigging

• Stainless Steel Dinghy Rigging
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• Replacing your Furling Line
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Rigging Shackles

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50 / 100 metre Rates - Running Rigging

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Control Lines

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Running Rigging Accessories

• Anti-Chafe Rope Protection
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Running Rigging Resources

• Running Rigging Rope Fibres and Construction Explained
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• Running Rigging - LIROS Recommended Line Diameters
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• Selecting the right type of block, plain, roller or ball bearing
• Recycling Rope
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Plain Bearing Blocks

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Deck Hardware Support

• Blocks and Pulleys Selection Guide
• Barton High Load Eyes
• Dyneema Low Friction Rings Comparison
• Seldén Block Selection Guide
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• Karver Winch Comparison Chart
• Lewmar Winch Selection Guide - PDF
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Sailing Flags

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Fixings and Fastenings

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Hatches and Portlights

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General Chandlery

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Flag Articles

• Flag Size Guide
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• Making and Repairing Flags
• Signal Code Message Definitions

Other Chandlery Articles

• Anchorplait Splicing Instructions
• Antifoul Coverage Information
• Hawk Wind Indicator Selection Guide
• Petersen Stainless - Upset Forging Information
• Speedy Stitcher Sewing Instructions
• Thimble Dimensions and Compatible Shackles

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Guard Wires, Guardrails and Guardrail Webbing

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• Lifejacket Lights
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Overboard Recovery

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Safety Resources

• Guard Wires - Inspection and Replacement Guidance
• Guard Wire Stud Terminal Dimensions
• Webbing Jackstays Guidance
• Webbing Jackstays - Custom Build Instructions
• Danbuoy Selection Guide
• Danbuoy Instructions - 3 piece Telescopic - Offshore
• Liferaft Selection Guide
• Liferaft Servicing
• Man Overboard Equipment - World Sailing Compliance
• Marine Safety Information Links
• Safety Marine Equipment List for UK Pleasure Vessels

Sailing Clothing

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Leisure Wear

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Sailing Footwear

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Leisure Footwear

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Sailing Accessories

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Clothing Clearance

Clothing guide.

• What to wear Sailing
• Helly Hansen Mens Jacket and Pant Size Guide
• Helly Hansen Womens Sailing Jacket and Pant Size Guide
• Lazy Jacks Mens and Womens Size Charts
• Musto Men's and Women's Size Charts
• Old Guys Rule Size Guide
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Clearance LIROS Racer Dyneema £55.08

Clearance Folding Stock Anchor £123.25

Clearance Sarca Excel Anchors £294.00

Clearance LIROS Herkules £0.00

Clearance Barton Size 0 Ball Bearing Blocks - 5mm £0.00

Clearance Marlow Blue Ocean® Doublebraid £18.48

Mooring Clearance

Anchoring clearance, standing rigging clearance, running rigging clearance, deck hardware clearance, chandlery clearance, safety clearance.

Team Jimmy Green has put together a range of load-rated shackles suitable for connecting your anchor to your anchor chain.

How to select your anchor to chain shackles:

• Select comparable break loads for each component of your anchor rode or anchoring system 
• Select hot-dipped galvanised or marine-grade stainless steel shackles for anchoring applications.
• Galvanised are less expensive and avoid any issue with dissimilar metals when connecting galvanised chains and anchors
• Select rated shackles for anchoring – check the load rating for compatibility with the chain and rope
• Avoid commercial pattern non-rated shackles for anchoring – if there is no provenance regarding their origin, there is no way of telling how weak they may be.
• Jimmy Green Galvanised Pin Shackles - genuine original green pin shackles, but with the pins hot-dip galvanised by Jimmy Green

Stainless Steel in contact with Galvanised Steel

Jimmy Green Marine stock anchoring shackles with a guaranteed manufacturer break load – test certificates are available for added reassurance – file them in the ship’s papers for future reference.

Shackles can be used to join an anchor warp to an anchor chain and to connect the end link of an anchor chain to the anchor.

Anchor Connections

Anchoring shackles can be used to attach the anchor to the end of the chain – two shackles back to back is the tried and trusted method.

Back to Back refers to the crown of each shackle bearing against one another, resulting in both the pins taking the load correctly, one in the hole/slot on the anchor shank, the other in the end link of the chain. A one-shackle solution may appear a simpler and cheaper method, but it could lead to disastrous results: The connecting hole or slot in the anchor shank is quite commonly a straight cut through the metal resulting in a hard right-angle edge. Passing the lug of a shackle through the slot and turning it to create a one-shackle connection with the pin through the end link of the chain may be possible. However, this will mean that the inside of the curved crown on the shackle will bear against the hard right-angle edges of the shank. This will adversely affect the strength of the connection and cause damage to the galvanising. Some anchors may have a bevelled, chamfered or filleted (rounded) edge around the shank slot/hole. However, the crown of a shackle will still only bear on the two machined edges, which will not optimise the spreading of the load. It is good practice to orientate all your connections, particularly metal to metal so that the two bearing edges are arranged to take the load in the best load-bearing manner.

Some anchor connectors require the addition of an anchor shackle to facilitate articulation - the photos below show examples of both good and not-so-good practices.

N.B. It is advisable to fit a suitable bow shackle between the anchor shank and the connector to reduce lateral load risk. Unless an anchor connector is specifically designed to withstand lateral loads, it must be able to articulate to align with the direction of the pull. One solution is to fit a shackle/ Maillon Rapide/ fixed connector to the anchor shank and attach this to 3 links of anchor chain, which is joined to the anchor connector on the larger pin end. You will generally need the links to be one size larger than your anchor chain.

The curved crown of the shackle will bear the load unevenly in this relatively harsh anchor slot.

The curved crown of the shackle will take the load better on a rounded anchor slot. However, this anchor shank is relatively thin compared with the shackle, which may cause load problems.

This anchor has a harsh, right-angle edge to the slot, but the shackle is correctly aligned so that the load is spread along the length of the pin. The next connection should provide articulation.

This anchor connection is quite long, but it is designed to swivel and twist so that the anchor comes up over the stem head in the right orientation. The shackle is aligned, so the pin takes the load on the relatively harsh anchor slot. The shackle has a socket pin head to prevent snagging as it passes over the bow roller. The banana-shaped connector is from Osculati and provides the twist facility. There is also a swivel connection between the chain and the Twist Connector, presumably fitted to help in this respect.

Modern anchors are not normally supplied with this feature. The tried and trusted CQR has a large shackle with a welded pin to facilitate a variety of options for connecting to the anchor chain. In this example, rotation is provided by the anchor connector and articulation by the extra shackle. The load-bearing point between the two shackles will slip from side to side on the straight pin, but not a great deal because of the oversize nature of the CQR fitted shackle. The orientation of the second shackle optimises the load bearing between its curved crown and the pin on the anchor connector.

• Anchor Right (1) Brierley Lifting (2) Captain Currey (1) Chaineries Limousines (1) Jimmy Green Marine (2) Loctite (1) Mantus Marine (1) Ormiston (1) Petersen Stainless (5) Proboat (5) Wichard (4)

Shackle Type

• Bow Shackle (10) D Shackle (9) High Resistance (3) Long Shackle (2) Shakeproof Retained Pin (2) Socket Pin (3)

Shackle Size

• 4mm (2) 5mm (5) 5mm shackle - 6mm pin (2) 6mm (2) 6mm shackle - 8mm pin (3) 7mm shackle - 8mm pin (1) 8mm (2) 8mm shackle - 10mm pin (3) 9mm shackle - 10mm pin (1) 10mm shackle - 11mm pin (5) 10mm (2) 11mm shackle - 12mm pin (2) 11mm shackle - 13mm pin (4) 11mm (1) 12mm (4) 12mm shackle - 16mm pin (2) 16mm (3) 13mm shackle - 16mm pin (4) 16mm shackle - 20mm pin (2) 16mm shackle -19mm pin (3) 19mm (2) 19mm shackle - 22mm pin (4) 22mm shackle - 25mm pin (5) 20mm shackle - 22mm pin (2) 22mm (1) 25mm shackle - 27mm pin (2) 36mm shackle - 38mm pin (2) 25mm shackle - 28mm pin (3) 27mm shackle - 30mm pin (2) 30mm shackle - 36mm pin (2) 38mm shackle - 41mm pin (2) 45mm shackle - 50mm pin (2)
• 6mm (1) 8mm (2) 10mm (2) 12mm (1)

Green Pin Shackles

Yellow pin shackles, load rated hot dip galvanised bow shackles, load rated hot dip galvanised d shackles, proboat rated stainless steel bow shackles, proboat rated stainless steel dee shackles, wichard allen head pin d shackle, force 7 grade 70 anchor chain shackle link, jimmy green galvanised pin d shackle, jimmy green galvanised pin bow shackles, wichard high resistance long d shackle, wichard shackle and spike tool.

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Dear Readers

Chafe Protection for Dock Lines

• Sails, Rigging & Deck Gear

Anchor Chain and Shackles

Choosing the right shackle for your anchor rode..

Ive been studying your recent articles on chain and galvanizing (see PS June 2014 and January 2015 online ), as I am about to replace the anchor chain on my catamaran. When it to comes to the shackles, I am confused.

If I use 3/8-inch Acco G43 proof-coil chain, why is the same-size galvanized shackle so much weaker? West Marine shows the Acco G43 chain rated at 5,400 pounds maximum working load (MWL), but the similarly sized shackle is rated at only 2,000 pounds MWL. It seems as though whatever size chain I select, the shackle is the weak link. How can I use a larger shackle on smaller chain?

Steve Wann Tonic, Catana 431 Virginia

Comparing specifications between two different types of products can get confusing. Part of the problem here is the data youre comparing. The products working load limits (WLL) and MWL are derived from the safety factors used in their manufacture. Because chain and shackles are made using different safety factors, their maximum working loads arent directly comparable.

Shackle specifications use safety factors ranging from 6:1 to 4.5:1 (depending on maker and size); however, the factors are degraded by 50 percent if the shackle is loaded at a 90-degree angle. G43 chain is made using a 3:1 safety factor; there is no variation for angle of pull.

Because of these very different safety factors, they seem very far apart in terms of strength, but if you compare their minimum breaking strength (MBS), the shackle is nearly as strong as the chain. The minimum breaking strength of 3/8-inch G43 chain is 16,200 pounds (3:1 safety factor). The minimum breaking strength of 3/8-inch Peerless and Campbell shackles are 24,000 pounds or 12,000 pounds (6:1 safety factor) at a 90-degree load, depending on the shackle grade (see below) and size. Crosby shackles, which work to a 4.5:1safety factor, have an MBS of 18,000 pounds to 9,000 pounds.

Shackles are graded according to strength: More common Grade A (3/8-inch) shackles have a WLL of approximately 1 ton, and Grade B shackles have a WLL of approximately 2 tons. (WLL varies by size.) Makers distinguish their shackle grades by coloring the pins: For example, the Crosby uses silver; Peerless (Peer-Lift line) uses blue pin; and Campbell uses orange.

If you use the 3/8-inch Acco G43 chain, we highly recommend going with a Grade B bow shackle one size up. The Peer-Lift Grade B 7/16-inch shackle should fit the hole in 3/8-inch chain and has an MBS of 32,000 pounds, almost double that of the chain (16,200 pounds). This means the shackle and chain will have similar strengths in worst-case scenarios (i.e. side loading the shackle), but in most situations, the shackle will be twice as strong as the chain. If you want overkill, the half-inch shackle likely will fit the chain also.

Always use a galvanized, rated bow shackle for the anchor rode. (Bow shackles articulate better.) Rated shackles have the WLL stamped on their body, along with the country of origin, a code indicating when the shackles were made and by whom, and their size (i.e. 3/8 inches). These shackles are batch tested for failure, and most-at least those made in Europe and the U.S.-are also proof tested (tested to twice the WLL). No stamped rating means theres no way to know whether it was tested or what its WLL should be. Trusting ground tackle to a shackle with unknown pedigree is asking for problems.

Crosby ( www.thecrosbygroup.com ), Peerless ( www.peerlesschian.com ), and Campbell ( www.campbellchainandfittings.com ) are the most easily accessible shackle brands in the U.S. All offer galvanized, rated bow shackles. Youll find these brands atmost chandlers or local lifting-gear specialists that sell lifting cables, chain, and fittings.

In addition to strength compatibility, youll need to check that all ground-tackle components physically match; this includes the windlass gypsy. Shackle and chain dimensions can vary from maker to maker, so it is essential to check. Cut off a link of your chain, and take it with you when shackle shopping; take the windlass gypsy along when chain shopping; or buy the whole lot at the same time from the same place.

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Boat Owners Warehouse offers a wide selection of shackles for boaters of all levels. Shackles are an essential component of any boat’s rigging system and are used to connect lines, chains, and other rigging components.

We carry a large variety, including anchor shackles, chain shackles, twist shackles, and more, all made from high-quality materials such as stainless steel and galvanized steel. This product is available in different sizes and strengths to meet the specific needs of your vessel.

Our selection is chosen with boaters in mind. We understand the importance of durability and reliability when it comes to boating equipment, and we are committed to providing our customers with the best quality products available.

Whether you are a seasoned boater or just getting started, Boat Owners Warehouse has what you need to keep your vessel secure and safe. Shop our selection online or visit one of our locations today.

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Wichard Long Shackle 1/4 1413

WICHARD INC -

Wichard 1/2in Bow Shackle 1246

Wichard 3/8in bow shackle 1245, wichard 5/16in bow shackle 1244, wichard 1/4in bow shackle 1243, wichard 1/2in d shackle 1206, wichard 3/8in d shackle 1205, wichard 5/16in d shackle 1204, wichard 3/16in d shackle 1202.

Yachting Monthly

• Digital edition

Three methods for seizing shackles

• Chris Beeson
• October 20, 2017

Shackles are often under high load. If one shakes open, the result could be dangerous. Chris Beeson shows how to make sure it won’t

This spinnaker block shackle somehow managed to hang on by jamming itself in place, but it wouldn’t endure actual use Credit: Graham Snook/YM

RYA Yachtmaster Chris Beeson has raced and cruised over 40,000 ocean miles in his 37 years as a sailor

I used to be doubtful about the necessity of seizing shackles. Nip the pin up tight with a shackle key or pliers and how can it possibly come loose? My mind was changed in 2011, while checking the rig of the old Jeanneau we used in our Crash Test Boat series. This was the rather concerning sight we found at the masthead.

The spinnaker block shackle’s pin had shaken itself free. Had we hoisted and flown an offwind sail, it would have draped itself expensively over the bow, possibly tearing itself in the process, as soon as the halyard chafed through on its mast exit.

What if a shackle securing a cruising chute sheet turning block rattled itself loose? You would have all the load in the sheet firing a block across the cockpit with potentially lethal consequences.

The problem is that boats are subject to a lot of vibration. Wind through the rigging creates vibration, current across an anchor chain creates vibration, engines cause vibration, so does sailing into waves. Shackle pins will work themselves free and problems will result. To prevent them doing so, we seize them.

We use one of three methods of seizing, or securing, the pin to ensure that it simply can’t loosen. One is using threadlock, which glues the pin in place but not with ‘super-glue’ adhesion so it can still be undone with standard tools.

A second method is using electrical cable ties, though it is worth remembering that these are subject to UV degradation and probably won’t last more than a season if they’re always out in the sun. The third method, the gold standard method of seizing shackles, is to use Monel wire. That isn’t subject to UV degradation and has excellent corrosion resistance properties.

Seizing with glue

Seizing shackles

We used Loctite 243 Blue, but search online for ‘threadlock’ if you want to see a range of alternative products that will do the job just as well as this one

Apply the threadlock to the thread of the shackle pin. It’s not very viscous, so make sure you’ve got something down to protect the deck from any drips

Once you’ve got good coverage on the entire thread, screw the shackle pin into the shackle, again watching out for any drips

Use pliers or a shackle key to nip up the shackle as tight as you can. This will help the glue to adhere without any risk of movement

This is the finished result. It’s the quickest and neatest of the methods and there’s no external seizing to foul on anything. Very tidy

This is the only method of seizing available if you are using the flush-pin type of shackle that’s often found in ground tackle set-ups

Seizing with cable ties

Cable ties are cheap to buy online or from many hardware shops. Thread it through the pin’s hole, then through the shackle’s loop

Next push the tie through the ratchet lock and pull it up as tight as you can. This will prevent the shackle pin from unscrewing itself

To make the cable tie seizing as compact as possible, use pliers to pull the tie through the ratchet lock as tight as you can manage

Snip off the excess length of tie leaving only a very short stub, to reduce any risk of the tie fouling or chafing on anything. It looks much neater, too

The finished article. It’s the quickest, simplest method and a good short-term solution. ideal for shackles that need to be undone occasionally over the course of the season

Here we see a cable tie seize on a shackle used to connect anchor and chain. It’s exposed to the sun, so is likely to become brittle from UV degradation after a year or so

Seizing with Monel wire

To start, with the shackle pin nipped up tight, cut a piece of wire about 15cm (6in) long and hold 5cm (2in) of it under the side of the shackle

Poke the wire up through the hole in the shackle pin then down through the shackle itself and repeat so you have two loops of wire around the shackle and through the pin

Use pliers to tighten the wire as much as you can to snug down the seizing onto the shackle. This helps to prevent any movement in the wire

With the second loop of wire wrapped and tightened, use pliers to twist the two ends of the wire together, again keeping it tight

Once you have got five or six twists on the ends, snip off the excess wire, press the twist against the shackle body and you’re done

This is Monel wire seizing on a spinnaker halyard block shackle. It’s a strong and durable solution for shackles that you can’t inspect regularly

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• Reviews (78)

Mantus Anchor Shackles

Stainless steel anchor shackle designed for the job:.

• A flush hex head allows for smooth passage through the bow roller
• A socket wrench or a crescent wrench could be easily used to open or close the pin even after many months of use.
• A hole in the hex head is designed to safety wire the pin to prevent pin loosening.
• Mantus boat anchor shackles are forged and use high quality 2205 Duplex stainless steel.

1/4	1,300	2,600/	1,300	6,500	7,800	5,200
5/16	1,850	3,900/	1,900	9,100	11,700	7,600
3/8	1,950	5,400/	2,650	9,750	16,200	10,600
7/16	2,600	7,200/	N/A	13,000	21,600	N/A
1/2	3,900	9,200/	4,500	19,500	27,600	18,000
5/8	5,200			26,000

• When sizing a stainless steel shackle for your anchor and Grade 30 galvanized chain, pick a shackle one size larger than the chain and the shackle will be the same strength as the chain.
• When sizing a stainless steel shackle for your anchor and Grade 40 galvanized chain, only a shackle one size larger will fit and the shackle will be 60 – 70% the strength of the chain. We recommend using a Mantus swivel  to match the strength of the shackle connection to that of the Grade 40 chain.

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78 reviews for SHACKLES

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Exactly what I was looking for!!

Perfect for my duplex anchor chain

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