An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5835-01-391-4556
NSN 5895-00-387-4901
NSN 6610-00-371-5953
NSN 5998-00-804-2257
NSN 5920-01-428-9220
NSN 5925-01-269-2210
NSN 6135-01-462-6040
NSN 5996-00-920-1431
NSN 5998-01-337-5234
NSN 5920-01-429-1373
NSN 5975-01-560-7225
NSN 6135-01-411-3212