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 5915-01-601-9095
NSN 5985-01-212-8130
NSN 5990-00-477-1362
NSN 6220-00-419-6152
NSN 5975-00-733-5988
NSN 6135-01-540-3385
NSN 5999-01-227-5689
NSN 5895-00-981-5571
NSN 5920-01-469-7072
NSN 5915-01-078-9455
NSN 6240-00-763-8696
NSN 6135-00-276-7625