An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6645-01-498-4103
NSN 6320-01-549-3153
NSN 6320-01-358-8069
NSN 5855-01-492-3403
NSN 5945-01-491-9698
NSN 6110-01-067-3741
NSN 5945-01-563-3443
NSN 5998-01-412-2132
NSN 6240-01-421-4025
NSN 5975-01-145-2464
NSN 2925-01-264-5256
NSN 4140-00-846-4786