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 6145-01-104-5084
NSN 2925-01-547-4565
NSN 4140-01-455-3837
NSN 5998-00-204-6452
NSN 6150-01-158-8232
NSN 6135-00-078-9931
NSN 5895-00-270-6595
NSN 5915-00-952-3049
NSN 5915-00-276-8332
NSN 5905-01-514-7467
NSN 6145-00-007-1620
NSN 6620-01-180-5855