An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 5985-01-509-0510
NSN 5985-01-331-7015
NSN 5910-01-470-8625
NSN 5915-01-473-0356
NSN 6620-01-031-8180
NSN 5945-01-468-6041
NSN 6110-00-984-4273
NSN 5855-01-342-3824
NSN 5999-01-525-8222
NSN 6620-01-441-7896
NSN 5950-01-398-8268
NSN 6145-00-257-1080