An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5999-00-173-6015
NSN 7035-01-371-0091
NSN 6240-01-537-3218
NSN 6220-01-207-1229
NSN 5835-00-033-0294
NSN 7035-01-350-4247
NSN 5985-01-026-1133
NSN 4140-00-660-8699
NSN 5925-01-553-8725
NSN 5905-01-411-6204
NSN 5935-01-381-2131
NSN 6685-01-634-0611