An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5998-00-191-5303
NSN 5910-01-612-1366
NSN 5935-01-448-6924
NSN 5996-01-425-2696
NSN 6110-01-388-1723
NSN 6135-00-803-3012
NSN 6110-01-220-4119
NSN 6135-01-366-9633
NSN 6145-01-250-6108
NSN 5975-01-524-6951
NSN 6135-00-166-5984
NSN 5910-00-526-8005