An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6110-01-419-7612
NSN 5925-00-308-2712
NSN 5960-01-527-7347
NSN 4140-00-587-7496
NSN 5945-01-484-9325
NSN 5975-01-519-8006
NSN 6150-01-629-3520
NSN 7035-01-307-5366
NSN 4140-00-104-7323
NSN 5920-01-604-9045
NSN 6150-00-636-8938
NSN 5930-01-577-7831