An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5930-01-440-9443
NSN 6650-01-525-0958
NSN 4140-01-423-1647
NSN 5985-01-278-9385
NSN 6620-00-248-9513
NSN 5855-01-235-5491
NSN 5835-00-289-9080
NSN 6620-00-317-7820
NSN 6685-00-806-9345
NSN 5925-01-359-4080
NSN 5950-01-563-5709
NSN 6110-01-631-4165