An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6320-01-395-9148
NSN 5835-01-114-3194
NSN 5905-00-385-9337
NSN 5920-01-271-6474
NSN 5835-00-327-3314
NSN 5985-00-205-9568
NSN 6135-00-050-7189
NSN 6650-01-519-3793
NSN 5996-00-827-7393
NSN 5965-01-509-3841
NSN 5999-01-512-6028
NSN 4140-01-125-1374