An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6135-00-686-4777
NSN 5895-01-079-1739
NSN 5915-00-421-3071
NSN 6130-01-444-4947
NSN 5965-01-598-6114
NSN 5945-01-050-8326
NSN 5895-00-377-9844
NSN 6320-00-004-9158
NSN 6650-01-444-8313
NSN 5999-00-520-6151
NSN 6145-01-068-4138
NSN 6150-00-916-8600