An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5990-01-615-4129
NSN 6320-00-194-4252
NSN 4140-00-165-6535
NSN 5996-00-182-7627
NSN 6645-00-425-6199
NSN 5835-01-318-5268
NSN 6220-00-810-9563
NSN 5945-01-439-1683
NSN 6220-01-165-3635
NSN 2925-00-642-8854
NSN 5905-00-959-6063
NSN 6150-00-808-9221