An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5920-00-042-6435
NSN 5910-00-342-4338
NSN 5930-01-350-7885
NSN 5920-01-202-4977
NSN 5975-01-356-3070
NSN 5910-01-245-3581
NSN 6650-01-533-1267
NSN 5990-00-285-1948
NSN 6110-01-117-7099
NSN 5920-01-428-9220
NSN 6650-01-364-8504
NSN 7035-01-652-2088