An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5935-00-639-1382
NSN 6620-00-450-3952
NSN 6645-00-411-3733
NSN 4140-00-811-2297
NSN 7035-01-023-7859
NSN 6130-01-074-6321
NSN 5920-01-025-8858
NSN 5950-01-338-5476
NSN 6150-00-104-8035
NSN 6650-00-904-9485
NSN 5999-00-105-7833
NSN 5915-01-028-8530