An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 7035-01-591-2766
NSN 5835-01-143-9143
NSN 6240-01-533-0851
NSN 5950-01-483-2277
NSN 6650-00-051-1395
NSN 4140-00-176-4761
NSN 6130-00-853-3127
NSN 5960-00-377-6558
NSN 5855-01-540-4797
NSN 6130-01-625-2779
NSN 5895-00-076-2200
NSN 5998-01-061-6597