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 5835-00-138-2601
NSN 5996-00-107-5357
NSN 6240-00-113-5239
NSN 6240-00-222-0276
NSN 5985-00-907-1499
NSN 5925-00-487-7542
NSN 6610-01-167-8747
NSN 6220-01-195-4010
NSN 5920-00-845-2581
NSN 5835-01-384-3206
NSN 5835-00-147-5062
NSN 5998-01-061-1246