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 5985-01-464-3153
NSN 5905-01-031-3302
NSN 5915-01-555-8081
NSN 6220-01-389-8933
NSN 6150-00-683-5349
NSN 6220-00-994-5033
NSN 5975-01-367-1859
NSN 5990-01-338-2103
NSN 5910-00-206-3224
NSN 6135-01-528-6896
NSN 5910-01-006-0414
NSN 6135-01-196-7399