An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6110-01-268-1723
NSN 5835-01-373-9506
NSN 5910-00-762-3960
NSN 5950-01-176-6722
NSN 6650-01-196-4667
NSN 6685-01-642-4465
NSN 5945-01-065-5793
NSN 2925-01-648-6859
NSN 5985-01-477-5311
NSN 5999-01-264-3393
NSN 5855-01-249-0717
NSN 5990-01-633-9503