An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6220-00-531-4522
NSN 5835-01-578-3443
NSN 5996-00-580-4129
NSN 5895-01-551-8309
NSN 6650-00-143-1889
NSN 5910-00-172-5413
NSN 6145-00-466-4068
NSN 6150-01-411-2281
NSN 6610-01-361-8965
NSN 5990-00-099-0822
NSN 6650-01-181-6037
NSN 7035-00-232-4043