An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 4140-01-468-7618
NSN 5985-00-727-7239
NSN 5999-01-154-3383
NSN 5930-01-498-9616
NSN 5895-00-500-0803
NSN 5945-01-026-9953
NSN 6320-01-265-0665
NSN 5996-00-239-2342
NSN 5935-01-634-0668
NSN 5855-01-136-1916
NSN 5855-00-631-4565
NSN 5960-01-474-4843