A cylindrical-shaped nut, the end opposite the bearing surface being designed with an internal socket or splines for use with an inserted wrench.
NSN 6150-01-502-6779
NSN 5999-01-477-1199
NSN 5975-01-112-0837
NSN 2925-01-620-9673
NSN 5985-01-203-6933
NSN 5835-01-263-1293
NSN 5985-00-375-1837
NSN 5920-00-463-9890
NSN 5930-01-129-6402
NSN 5975-01-280-5371
NSN 5910-01-071-8777
NSN 5965-00-822-8549