An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5935-01-512-1988
NSN 6645-01-607-5999
NSN 5905-00-250-6294
NSN 5998-00-444-6199
NSN 6220-01-248-4452
NSN 5975-00-189-0857
NSN 6110-01-128-3050
NSN 5905-00-187-0428
NSN 5855-00-411-8688
NSN 5975-01-288-0119
NSN 5905-00-423-7407
NSN 5990-00-543-0234