An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 4140-00-322-9987
NSN 6110-00-263-6664
NSN 5905-00-373-9703
NSN 6145-01-078-4022
NSN 6320-01-150-5378
NSN 6620-00-948-3801
NSN 5975-01-506-3520
NSN 6685-01-251-8938
NSN 6620-01-089-4416
NSN 6620-01-103-7508
NSN 5965-01-495-1170
NSN 5965-00-450-5408