An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 7035-01-335-7536
NSN 6135-01-370-2599
NSN 5895-01-338-3032
NSN 5975-00-776-4604
NSN 6645-01-324-2002
NSN 5935-01-025-1624
NSN 5985-00-989-9659
NSN 5965-01-376-1012
NSN 5965-01-252-8701
NSN 6320-00-593-0379
NSN 6610-00-088-4404
NSN 6610-01-319-5039