An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6150-01-268-2384
NSN 5985-00-218-1356
NSN 6240-01-032-5105
NSN 5996-00-538-7829
NSN 6130-00-833-7763
NSN 5999-01-572-6348
NSN 6645-01-633-1852
NSN 6685-01-199-3239
NSN 5930-01-187-0088
NSN 2925-01-424-0235
NSN 7035-01-629-5792
NSN 2925-00-234-0479