An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6220-00-502-6380
NSN 6105-01-233-8425
NSN 5998-01-474-5855
NSN 5950-01-495-2652
NSN 5895-01-547-7218
NSN 6650-00-107-8509
NSN 5985-00-017-6337
NSN 7035-01-633-9537
NSN 5920-01-435-9530
NSN 6240-01-085-3403
NSN 5915-01-633-9845
NSN 6610-01-349-6333