An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5950-00-820-6179
NSN 5945-01-460-2038
NSN 6620-01-271-6192
NSN 5985-01-343-0861
NSN 5998-00-892-2200
NSN 6220-01-524-8306
NSN 5930-01-510-8508
NSN 5925-01-066-1911
NSN 6135-01-499-6293
NSN 5990-01-078-1294
NSN 5930-01-587-5656
NSN 6620-01-491-1434