An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6620-01-501-8593
NSN 6220-01-487-3904
NSN 6320-01-006-6138
NSN 4140-01-338-1147
NSN 5945-00-597-2049
NSN 5950-01-168-7510
NSN 5998-01-487-5558
NSN 6650-00-269-5000
NSN 6650-01-213-1231
NSN 5920-00-014-7686
NSN 5935-01-463-3758
NSN 5935-00-822-3847