An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5920-00-665-3973
NSN 5950-01-436-5244
NSN 5960-01-291-5593
NSN 5945-01-508-7882
NSN 6130-01-423-1630
NSN 5945-01-191-4719
NSN 6240-01-269-8454
NSN 5835-00-532-5910
NSN 5915-01-125-7540
NSN 4140-01-172-1295
NSN 7035-01-472-1999
NSN 5950-01-272-7179