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 6620-01-352-5640
NSN 5905-01-411-6204
NSN 5990-01-312-2638
NSN 6150-00-456-0775
NSN 6110-00-625-8643
NSN 4140-00-407-1326
NSN 5960-00-237-6917
NSN 6685-00-009-0203
NSN 5996-01-608-1254
NSN 6650-00-754-2276
NSN 5999-00-276-9299
NSN 5910-01-272-8482