An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6650-01-265-2672
NSN 6130-00-532-6861
NSN 5910-01-136-6489
NSN 7035-01-227-2546
NSN 2925-00-408-9829
NSN 6240-00-953-2673
NSN 5985-00-185-5430
NSN 6220-01-175-1246
NSN 5910-01-320-8622
NSN 6645-01-244-4881
NSN 6145-01-332-9171
NSN 6110-00-942-1373