A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 5920-00-453-3138
NSN 4140-00-757-5270
NSN 6220-01-530-0725
NSN 6240-01-262-0148
NSN 5905-00-148-0368
NSN 5996-01-578-6162
NSN 5965-01-368-8482
NSN 6110-01-457-3731
NSN 6110-01-289-1284
NSN 7035-01-432-1163
NSN 6240-01-389-9198
NSN 5910-00-235-0911