A metallic or nonmetallic circular item specifically designed to be placed at the breech-block end of a gun barrel chamber for sealing against powder gases. It is also used to seal against powder gases between a projectile and the gun barrel.
Classification: Parts and accessories of military artillery weapons of 9301.11 or 9301.19
NSN 2925-00-233-5644
NSN 5915-01-250-2451
NSN 4140-00-287-9199
NSN 5945-00-189-6571
NSN 6150-00-061-7860
NSN 5930-01-252-9911
NSN 5925-01-139-3151
NSN 5960-01-048-4885
NSN 4140-01-261-0032
NSN 5895-01-197-2930
NSN 6150-01-587-6140
NSN 5910-01-159-2586