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 5925-00-205-2767
NSN 5985-01-025-4485
NSN 5998-00-557-0459
NSN 5925-00-081-8720
NSN 6145-00-767-6704
NSN 5855-00-987-1171
NSN 6220-01-152-1701
NSN 6150-00-661-0184
NSN 5996-01-370-9886
NSN 5985-00-835-1218
NSN 5985-01-333-8944
NSN 5945-00-419-0184