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 4140-01-432-0855
NSN 6685-01-578-7011
NSN 6650-01-520-4469
NSN 6610-01-582-8181
NSN 5910-01-449-9583
NSN 6645-00-300-0401
NSN 5930-01-623-7276
NSN 5925-01-514-6526
NSN 5925-01-535-8420
NSN 5905-01-234-5378
NSN 5905-00-760-7178
NSN 5965-01-589-0448