3 inch diameter; stainless 316 (1613ss); 3 holes (0.375) equally spaced
A device used to prevent passage of flame through a ventilating duct while air is flowing.
NSN 2925-01-157-9204
NSN 6320-00-228-5678
NSN 5998-01-588-6435
NSN 5960-01-284-9209
NSN 5930-00-980-1984
NSN 5910-01-146-4317
NSN 5945-00-081-7412
NSN 6130-00-473-0342
NSN 6110-01-555-6119
NSN 6610-00-465-4983
NSN 5960-01-399-4327
NSN 6105-01-325-4085