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 6610-01-172-4041
NSN 2925-00-608-0856
NSN 5910-01-540-7479
NSN 5920-01-418-0863
NSN 5998-01-582-3942
NSN 5990-01-040-1320
NSN 6645-01-609-4545
NSN 5945-01-173-1571
NSN 6610-01-359-9962
NSN 6610-01-502-7106
NSN 5990-00-133-7734
NSN 5990-01-238-1975