An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5965-01-339-8139
NSN 6105-01-634-0322
NSN 6320-00-004-9158
NSN 5915-00-678-9869
NSN 5975-00-196-0698
NSN 5985-01-518-2788
NSN 4140-00-916-2771
NSN 5985-01-019-8556
NSN 7035-01-595-5270
NSN 5935-01-067-9491
NSN 5920-01-400-0791
NSN 5905-01-587-3801