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 5996-00-160-1772
NSN 4140-01-021-5674
NSN 6145-01-197-2686
NSN 5910-00-859-8320
NSN 6620-00-529-6275
NSN 5990-00-372-5177
NSN 5985-01-508-4398
NSN 5975-00-187-5305
NSN 6645-00-833-2395
NSN 5990-00-239-3432
NSN 5835-01-464-7038
NSN 5998-00-089-4023