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 6220-01-386-3082
NSN 6105-01-547-0294
NSN 6220-01-263-9494
NSN 6135-00-016-0071
NSN 5945-01-312-3323
NSN 5910-01-445-4227
NSN 6145-01-398-0493
NSN 6110-00-231-0776
NSN 5950-01-409-9232
NSN 2925-00-631-0548
NSN 6645-00-450-2209
NSN 6105-01-104-6154