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 5996-01-273-7333
NSN 5990-00-968-7685
NSN 6620-01-659-8160
NSN 6145-00-246-9776
NSN 5910-01-196-5110
NSN 6135-01-222-0703
NSN 5915-01-243-0624
NSN 7035-01-283-2536
NSN 6320-00-313-9114
NSN 4140-00-110-4524
NSN 5960-01-237-2336
NSN 5996-00-175-0462