Shoulder is d-shaped with center to flat 0.245-0.255 in.
A headless fastener not exceeding 12 inches (304.8 mm) in length, threaded externally on both ends with threads of the same nominal diameter. All or part of the unthreaded section has a cross-sectional diameter greater than the nominal stud size plus 0.020 inches (0.508 mm). It may be thread relieved. See also stud, locked in.
NSN 5905-00-231-5243
NSN 6320-01-116-3980
NSN 5998-00-548-3191
NSN 5975-00-841-1284
NSN 7035-01-578-5403
NSN 6620-01-655-4591
NSN 5895-01-279-3922
NSN 5910-01-512-6358
NSN 5950-01-648-8649
NSN 5930-01-442-3075
NSN 5999-01-066-7247
NSN 5990-01-443-2931