An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 7035-00-140-3070
NSN 6110-01-384-4292
NSN 6220-01-113-7501
NSN 5915-00-852-6663
NSN 6105-01-359-3886
NSN 5920-01-506-3865
NSN 5999-01-597-1296
NSN 6135-01-550-6279
NSN 7035-01-057-6325
NSN 6320-01-347-2638
NSN 7035-01-602-3709
NSN 5985-00-372-3184