An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5895-00-469-8047
NSN 6220-01-620-2918
NSN 5985-00-325-8278
NSN 6650-01-044-6377
NSN 5915-01-605-5184
NSN 5960-01-068-9609
NSN 5960-01-239-4314
NSN 6220-01-030-2697
NSN 5960-00-633-7670
NSN 5990-00-144-3243
NSN 6135-01-422-0140
NSN 5905-01-157-9531