An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6110-01-550-3669
NSN 6650-01-586-0426
NSN 6685-01-374-2088
NSN 5905-01-463-7076
NSN 5925-01-308-7858
NSN 6610-01-498-4063
NSN 5965-01-058-1076
NSN 6220-00-194-3004
NSN 5998-00-189-0350
NSN 5855-00-451-5224
NSN 6105-00-446-2971
NSN 5925-00-950-7444