An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 7035-00-275-5604
NSN 5895-01-440-9457
NSN 6135-01-391-8539
NSN 6610-00-113-4552
NSN 5999-01-127-8157
NSN 5855-01-562-6560
NSN 5975-00-405-1938
NSN 5985-00-277-4230
NSN 6110-00-231-3751
NSN 5960-00-297-7099
NSN 6645-00-972-5239
NSN 6645-00-556-5551