An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5945-01-166-5239
NSN 5999-01-413-7302
NSN 6105-01-535-7636
NSN 6620-00-270-3275
NSN 5895-00-360-0117
NSN 6320-01-039-5891
NSN 6320-00-937-5625
NSN 5985-01-253-4235
NSN 5999-01-328-7930
NSN 5915-00-838-1891
NSN 6685-01-466-1916
NSN 5996-01-280-9922