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 5905-01-263-4944
NSN 6240-01-100-7105
NSN 5895-01-122-5582
NSN 6240-01-106-2447
NSN 7035-01-472-1999
NSN 5996-00-987-5409
NSN 6620-01-478-5500
NSN 6110-01-148-8136
NSN 5990-00-155-2306
NSN 5990-00-102-7423
NSN 5950-01-660-3276
NSN 5835-01-412-0344