An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6645-01-479-5364
NSN 5935-01-420-5897
NSN 5855-01-492-6913
NSN 6620-00-646-9474
NSN 5910-01-003-0876
NSN 5999-01-634-0576
NSN 5915-01-541-8883
NSN 5965-00-296-1808
NSN 4140-01-188-2861
NSN 2925-01-484-8556
NSN 6645-01-633-1852
NSN 6145-01-446-5421