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 5930-01-641-5049
NSN 4140-00-805-9531
NSN 5975-01-170-5287
NSN 5910-01-117-8260
NSN 5925-01-468-4604
NSN 5996-00-382-3597
NSN 6110-01-495-2211
NSN 5990-00-007-4313
NSN 5996-01-310-8411
NSN 6320-00-456-0836
NSN 6685-01-198-5776
NSN 5999-01-413-2876