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 5998-01-515-2276
NSN 5910-00-042-7878
NSN 5998-01-250-2793
NSN 5920-01-395-3748
NSN 5990-00-934-3145
NSN 5960-01-599-9821
NSN 5985-01-556-7379
NSN 5985-01-076-3966
NSN 6620-00-736-8457
NSN 6320-01-270-1419
NSN 6645-00-905-7258
NSN 2925-01-381-5307