An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6610-00-390-8471
NSN 7035-01-066-2441
NSN 4140-01-079-1146
NSN 5930-01-580-4585
NSN 5835-01-457-7951
NSN 5930-00-050-0007
NSN 6645-00-330-2813
NSN 5925-01-325-0288
NSN 5960-01-074-6110
NSN 6650-00-486-7924
NSN 6105-01-588-5587
NSN 5835-00-859-8330