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 4140-01-307-6322
NSN 5965-00-170-8676
NSN 6150-01-075-7544
NSN 6685-01-169-8760
NSN 5965-00-153-5216
NSN 6150-00-097-6136
NSN 5965-01-600-2183
NSN 5835-01-442-6482
NSN 5960-01-391-1308
NSN 6110-01-048-2414
NSN 6220-01-603-6937
NSN 5895-00-466-3100