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 2925-01-364-7926
NSN 5990-01-575-3275
NSN 4140-00-580-2742
NSN 5998-01-562-9055
NSN 7035-00-238-3662
NSN 4140-00-797-7765
NSN 6320-01-512-2031
NSN 5920-00-160-7626
NSN 5985-01-138-3937
NSN 6645-01-413-0515
NSN 6220-00-071-9789
NSN 6135-01-361-9297