An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6240-01-399-4105
NSN 6320-01-436-9228
NSN 6240-01-078-9490
NSN 2925-01-424-0235
NSN 6620-01-187-7267
NSN 5975-01-247-4053
NSN 4140-00-277-6285
NSN 5960-00-145-9361
NSN 6105-01-648-2644
NSN 5835-01-357-1247
NSN 5999-00-048-6632
NSN 5925-01-082-0591