Shackles
Four-Part Shackles
These are shackles that include a safety keeper or cotter key that prevents the nut from backing off the pin.
The safety keeper or cotter pin should be the proper length and diameter to fit snuggly in the hole through the pin.
At no time should the shackle be assembled for use with just the safety pin installed.
Prior to loading the shackle, the nut must first be in place and snug before the safety pin is installed.
Four-part shackles should be used in permanent or semi–permanent overhead installations and should be inspected weekly to ensure the safety pin and nut are secure and that the shackle has not been damaged by traveling equipment or other contact.
Knowledge Check Choose the best answer for the question.
7-7. Before hoisting a load overhead, what is the final part installed on the four-part shackle?
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