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 5935-01-242-4547
NSN 5960-01-142-1995
NSN 6650-01-519-9165
NSN 5975-00-045-1715
NSN 5985-01-555-8057
NSN 6135-00-932-3136
NSN 5996-00-258-9184
NSN 5930-00-188-2175
NSN 5930-00-151-4787
NSN 7035-00-166-0339
NSN 6650-00-393-0447
NSN 5960-01-265-8069