An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 4140-00-509-2389
NSN 5895-01-521-7708
NSN 5990-00-840-6571
NSN 6150-01-100-4337
NSN 6320-00-483-0451
NSN 6320-01-090-8296
NSN 5960-01-045-8524
NSN 5999-01-381-8800
NSN 6610-01-606-8788
NSN 6220-01-200-6461
NSN 5835-01-123-8305
NSN 6135-01-231-4809