Customer Concerns over Recommended Shackle Pin Length

Rigging | By Columbus McKinnon Training | Feb 01, 2019


Bill asks the following question about shackles and shackle pin length:

“I have a concerned employee because we have some screw pin shackles with pins that do not protrude past the clevis when fully engaged. I have looked in several rigging books and cannot find any information on the threaded pin. We have other shackles from another manufacturer, and those pins extend approx 1/16″ past the end of the clevis. I know this sounds trivial, but we need to address every safety concern raised by our crew members. I would appreciate any information you could provide on shackle pin length.”


Our Columbus McKinnon Training Team answers:
There have been many misconceptions on how a screw pin should be applied on a shackle.  Many riggers will tell you to get the pin snug then back off a 1/2 turn. This is incorrect.  The 2010 revision of ASME B30.26 Rigging Hardware, section 26-1.9.4 Rigging Practices states “The screw pin threads shall be fully engaged and tight, and the shoulder should be in contact with the shackle body. “

So, to answer your question: The threads do not need to extend beyond the shackle body.

It is good practice to obtain the latest copy of the ASME B30.26 standard for more information.

Columbus McKinnon Training

Articles authored by "Columbus McKinnon Training" were written by industry professionals with decades of unique and in-depth experience in the material handling industry who are no longer employed by Columbus McKinnon.

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