5306-00-616-2942 (AN177H17A)
NSN 5306-00-616-2942 (NIIN 00-616-2942) is a close tolerance bolt in Federal Supply Class 5306, Bolts — an externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated. Manufacturer part number AN177H17A (Aeronautical Standards Group Dept Of, CAGE 88044).
Key specs: 26 rockwell c minimum and 32 rockwell c maximum overall hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required).