SS-P-186D, FEDERAL SPECIFICATION: PENCIL, MECHANICAL (INCLUDING LEADS AND ERASERS) (10 AUG 1965) [S/S BY A-A-2801, A-A-2909, A-A-2910]

SS-P-186D, FEDERAL SPECIFICATION: PENCIL, MECHANICAL (INCLUDING LEADS AND ERASERS) (10 AUG 1965) [S/S BY A-A-2801, A-A-2909, A-A-2910]., This specification covers graphite, clay, and wax lead mechanical pencils, for general writing purposes.