An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6150-01-619-5331
NSN 6110-00-588-8582
NSN 6320-01-462-3555
NSN 5935-01-504-1917
NSN 7035-01-230-0250
NSN 5835-00-949-3018
NSN 6135-00-182-7008
NSN 5990-01-191-9624
NSN 5935-00-052-9610
NSN 5855-01-580-4634
NSN 5998-01-505-0967
NSN 5965-00-605-8239