An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5985-01-462-0828
NSN 4140-01-467-3620
NSN 5835-01-351-3425
NSN 5996-01-384-2115
NSN 5998-01-298-3618
NSN 6105-00-231-4370
NSN 6150-01-392-0616
NSN 6105-00-225-8745
NSN 5930-01-031-4714
NSN 6650-01-555-9348
NSN 4140-01-463-1331
NSN 5945-00-242-1488