An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5835-00-170-5238
NSN 6650-01-429-9242
NSN 5915-01-141-6726
NSN 5930-01-254-8984
NSN 6220-00-079-0178
NSN 6685-01-461-1069
NSN 7035-00-570-4100
NSN 5920-01-424-0745
NSN 4140-01-129-8885
NSN 5990-00-001-7588
NSN 6650-00-403-5251
NSN 6320-00-194-4252