An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 7035-00-760-5479
NSN 5910-00-090-8202
NSN 5855-01-177-4183
NSN 6110-00-205-1778
NSN 6145-00-195-5608
NSN 6130-00-361-7114
NSN 5990-01-164-0220
NSN 5930-01-557-3353
NSN 6685-01-110-5652
NSN 5965-01-550-7505
NSN 6220-01-233-1534
NSN 5990-00-586-6435