An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5945-01-040-5749
NSN 6145-01-045-2594
NSN 5950-01-503-0747
NSN 5915-01-157-2807
NSN 5996-00-075-0980
NSN 5930-01-573-8366
NSN 5935-00-837-7281
NSN 6145-01-512-1870
NSN 5855-01-509-6872
NSN 5965-01-107-4078
NSN 5920-01-100-3018
NSN 5905-00-419-0326