An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6220-00-179-1683
NSN 6130-00-932-1591
NSN 5996-01-445-7284
NSN 6610-00-226-4710
NSN 6135-01-490-7704
NSN 2925-00-420-5566
NSN 6220-01-506-3743
NSN 6105-00-045-7930
NSN 5915-00-001-3117
NSN 6150-01-013-9229
NSN 5915-01-112-0728
NSN 5920-00-422-0757