An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5920-00-171-2347
NSN 6320-00-405-2348
NSN 5895-01-319-3846
NSN 5905-00-834-9109
NSN 5935-01-485-2457
NSN 5935-01-385-5186
NSN 5996-01-633-7979
NSN 6130-01-254-1548
NSN 6240-01-472-7082
NSN 2925-01-440-7617
NSN 5915-00-571-4748
NSN 5945-00-137-6257