An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6685-01-422-7052
NSN 6110-01-481-3682
NSN 6150-01-181-5473
NSN 6135-01-222-0703
NSN 6145-01-429-8529
NSN 5960-01-430-3911
NSN 6650-01-108-6629
NSN 5835-01-073-1345
NSN 5920-01-446-4524
NSN 6620-00-383-8740
NSN 6685-01-566-3309
NSN 5999-00-921-8777