An/plt-4. Ssr name is screen, flame
A device used to prevent passage of flame through a ventilating duct while air is flowing.
NSN 5998-01-626-8772
NSN 5910-01-352-0267
NSN 5855-00-138-2386
NSN 6240-01-324-6569
NSN 5996-01-358-6528
NSN 5910-00-687-1254
NSN 6110-01-116-0073
NSN 6110-00-891-9917
NSN 5895-00-678-6598
NSN 2925-00-824-2186
NSN 6105-01-423-0985
NSN 5855-01-047-3231