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About Shackles and Oversize End Links

 

Anchor chain is usually attached to an anchor or other device using shackles.  Most times a shackle that will fit a chain does not have the same working load limit as the chain and that's not good.  So what do we do to fix that?  I'm glad you asked.  First, look at the pictures below.  We'll call one "pin to link" and the other we'll call "bow to link".  Yeah, I know we could call them picture "A" and picture "B" but that's really boring so we won't.

 

Click image to enlarge

Pin to Link Bow to link

 

What's the largest shackle you can use?

 

Chain  

Chain

WLL lbs

Pin to Link (WLL lbs)

Max Shackle Size

Bow to Link (WLL lbs)

Max Shackle Size

5/16 Gr 40  

   3900

   7/16 (3000)

   1/4   (1000)

3/8 Gr 40  

   5400

   7/16 (3000)

   5/16 (1500)

5/16 BBB  

   1900

   7/16 (3000)

   1/4   (1000)

3/8 BBB  

   2650

   7/16 (3000)

   5/16 (1500)

*WLL = Working load limit in pounds

 

 

 

 

 
 

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