An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6240-00-681-1639
NSN 6650-01-236-0366
NSN 5930-01-582-5624
NSN 5965-01-005-6617
NSN 2925-01-022-8332
NSN 5998-01-491-5750
NSN 6145-01-150-6018
NSN 5950-00-099-9612
NSN 6620-01-519-2628
NSN 5960-01-238-7367
NSN 5855-01-456-8667
NSN 6645-00-079-1430