5305-00-151-6968 (HT239PB4-4)
NSN 5305-00-151-6968 (NIIN 00-151-6968) is a close tolerance screw in Federal Supply Class 5305, Screws — a screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated. Manufacturer part number HT239PB4-4 (Hi-Shear Corporation, CAGE 73197).
Key specs: 36 to 40 rockwell c overall hardness; full characteristics table below. NIIN assigned November 1970; DEMIL A (none required); unit of issue EA (each), $7.14 gov standard price; ships at 0.02 lb / 0.0014 cu ft.