An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5935-00-427-4414
NSN 5835-01-424-0054
NSN 5998-01-247-8850
NSN 5910-00-189-7516
NSN 6240-01-024-9856
NSN 5895-00-626-9031
NSN 5905-01-106-1878
NSN 4140-00-916-2771
NSN 4140-00-902-7744
NSN 4140-01-323-8629
NSN 5910-01-607-6699
NSN 6650-01-549-2596