Material: type 4, ih specification a-31 part i, sae grade 8
A headless fastener not exceeding 12 inches (304.8 mm) in length, threaded externally on both ends with threads of the same nominal diameter. The maximum diameter of the unthreaded portion must not be greater than the nominal thread diameter plus 0.020 inches (0.508 mm). The unthreaded portion must be without locking or wrenching provisions. It may be thread relieved. See also rod, threaded end and rod, continuous thread.
NSN 6130-01-422-4709
NSN 6320-00-225-7013
NSN 4140-01-326-8535
NSN 5990-01-234-8646
NSN 6240-01-575-0067
NSN 4140-00-934-8800
NSN 5990-00-713-9016
NSN 6645-00-801-0950
NSN 6240-01-347-0072
NSN 4140-00-170-5152
NSN 6110-01-419-7612
NSN 5855-01-462-0495