An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5945-01-359-3028
NSN 4140-01-485-3321
NSN 5935-00-368-8995
NSN 6610-01-564-4084
NSN 5945-00-937-9181
NSN 6105-00-828-4178
NSN 5950-01-132-6433
NSN 5960-00-728-5209
NSN 5990-01-647-8574
NSN 5855-00-100-9003
NSN 6620-01-031-8180
NSN 6685-01-337-3228