An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6220-01-454-2540
NSN 6620-00-708-2688
NSN 6220-00-126-2691
NSN 5985-00-455-8555
NSN 6320-01-652-3806
NSN 5905-00-995-7385
NSN 6685-01-519-2778
NSN 5999-01-351-5601
NSN 6130-01-543-5798
NSN 6610-01-415-5877
NSN 6105-01-068-5092
NSN 5915-00-181-9223