An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5925-01-117-8170
NSN 5985-01-542-8204
NSN 6240-01-169-4664
NSN 6145-01-026-0030
NSN 7035-01-390-1132
NSN 5999-00-141-9441
NSN 6220-01-201-8216
NSN 7035-00-300-3208
NSN 5960-00-644-0299
NSN 6145-01-529-9831
NSN 5950-01-476-8171
NSN 5960-01-174-6975