No other part numbers with same form, fit, and function found.
A device used to prevent passage of flame through a ventilating duct while air is flowing.
NSN 5965-01-623-8583
NSN 5925-00-812-1987
NSN 5999-00-249-9339
NSN 6685-01-315-6984
NSN 6145-01-141-4127
NSN 4140-01-161-8075
NSN 6645-01-069-3286
NSN 5975-00-467-8777
NSN 6620-00-408-5478
NSN 6645-00-724-7668
NSN 5835-01-534-3172
NSN 6145-00-905-5374