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 5920-00-012-2000
NSN 5895-01-479-8735
NSN 6650-01-019-3441
NSN 2925-01-400-2286
NSN 6145-00-150-5049
NSN 6220-01-198-6536
NSN 5990-00-236-0831
NSN 5960-00-215-5884
NSN 5925-00-369-7747
NSN 5965-01-157-2403
NSN 6220-01-513-3484
NSN 6320-00-701-0437