An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6150-01-109-9086
NSN 6220-00-407-3242
NSN 6650-01-337-5309
NSN 7035-01-045-7202
NSN 5920-00-138-7645
NSN 5990-00-629-0032
NSN 7035-01-211-5636
NSN 5985-01-227-3117
NSN 6685-01-256-6443
NSN 5935-01-511-0486
NSN 5990-01-009-3634
NSN 5975-01-528-4881