An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6240-01-381-5541
NSN 5925-00-156-4044
NSN 6650-01-643-0534
NSN 4140-01-312-5508
NSN 6610-01-406-4985
NSN 6620-01-431-0706
NSN 5855-01-400-1590
NSN 6150-00-370-9709
NSN 5975-01-273-0209
NSN 6105-00-153-0238
NSN 6220-01-184-8738
NSN 7035-01-003-9142