An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 4140-00-155-8012
NSN 5915-00-678-0177
NSN 5855-01-513-9601
NSN 5996-01-623-3067
NSN 5998-01-556-7451
NSN 5945-01-344-1144
NSN 5998-00-582-1159
NSN 5925-00-946-9423
NSN 5905-01-361-9076
NSN 5998-01-391-1310
NSN 5996-00-915-1385
NSN 5945-01-435-1340