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 5990-00-103-0528
NSN 5925-00-421-0795
NSN 5930-01-528-6757
NSN 2925-01-456-6840
NSN 5920-00-368-4151
NSN 6150-01-505-1686
NSN 6110-00-167-7522
NSN 6620-00-727-8043
NSN 6105-01-014-5842
NSN 6110-00-361-6510
NSN 6135-01-575-5061
NSN 6145-01-046-2873