An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5835-00-853-7785
NSN 6150-01-562-9153
NSN 5998-00-467-0076
NSN 4140-00-508-3206
NSN 5998-00-772-2815
NSN 5930-01-489-6205
NSN 6645-01-470-7246
NSN 5895-00-900-8511
NSN 2925-01-138-8104
NSN 2925-00-549-6759
NSN 6650-01-539-6634
NSN 6110-00-065-4742