An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6610-01-555-8364
NSN 6620-01-036-6687
NSN 5855-01-538-5521
NSN 4140-01-364-2913
NSN 6645-01-549-8910
NSN 6110-01-383-7195
NSN 5910-01-017-4969
NSN 5915-01-441-7857
NSN 5855-01-358-5253
NSN 6240-00-364-0850
NSN 5999-01-626-9783
NSN 5930-00-776-4186