An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6320-00-646-3311
NSN 5945-00-156-0781
NSN 6145-01-425-5486
NSN 5998-00-827-0527
NSN 6150-01-204-9384
NSN 6645-01-385-7033
NSN 5925-00-921-1171
NSN 6685-01-464-3128
NSN 4140-01-162-4497
NSN 6220-00-393-0681
NSN 6240-01-148-0379
NSN 6150-01-457-2258