An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6685-01-415-1619
NSN 6610-01-158-7311
NSN 5985-00-808-5270
NSN 5975-01-215-1205
NSN 5990-00-611-1661
NSN 5935-00-110-3298
NSN 6240-01-361-9167
NSN 5990-01-591-0701
NSN 5975-00-161-4947
NSN 6240-00-054-1761
NSN 5999-01-476-8123
NSN 6220-01-275-0995