6240-00-539-8413 (PH1MT20-120V)
NSN 6240-00-539-8413 (NIIN 00-539-8413) is an incandescent lamp in Federal Supply Class 6240, Electric Lamps — an item whose principal purpose is to produce light from a glowing filament(s). Manufacturer part number PH1MT20-120V (Lamp Industry For Use With Industry, CAGE 08108); also referenced as DPT115-120V, PH1MT20-120 (American National Standards); DPT (Lamp Industry For Use With Industry).
Key specs: filament shielding, heat resistant glass; 50 average life in hours; not rated filament heavy duty service; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); unit of issue EA (each); export Schedule B 9405.49.0000. Supersedes 6240-00-917-0770 (1968).