An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6645-01-254-0490
NSN 5950-00-564-2950
NSN 5975-01-237-8502
NSN 6620-00-816-9755
NSN 5990-01-465-9235
NSN 5999-01-232-0924
NSN 4140-00-570-6545
NSN 5950-01-205-8137
NSN 6650-01-515-0391
NSN 5935-00-339-7538
NSN 5930-01-281-0646
NSN 5950-00-558-7958