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 5990-00-965-0495
NSN 5990-00-366-0112
NSN 5999-00-514-2142
NSN 5915-01-253-2792
NSN 5930-01-608-3022
NSN 6645-00-368-8636
NSN 5999-01-050-9496
NSN 6130-00-087-2577
NSN 6105-01-252-6714
NSN 5990-01-074-6549
NSN 5920-01-027-6810
NSN 6650-01-345-4257