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 5990-01-364-0813
NSN 5996-01-435-5547
NSN 5945-00-931-7761
NSN 5920-01-339-7421
NSN 6685-01-418-0925
NSN 6610-01-421-4396
NSN 6150-01-309-7482
NSN 6220-00-295-3594
NSN 5905-00-520-7931
NSN 6110-01-174-3161
NSN 5935-00-938-6384
NSN 5835-00-513-9680