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 5985-01-598-3968
NSN 5996-01-116-1988
NSN 2925-01-462-1620
NSN 5999-00-295-6285
NSN 6685-01-373-5767
NSN 5998-01-371-6504
NSN 6620-00-451-8783
NSN 5990-00-099-0822
NSN 4140-01-504-9512
NSN 6135-01-062-5420
NSN 6620-01-502-1656
NSN 5915-01-104-2290