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 6150-01-151-2245
NSN 5990-01-157-0441
NSN 5915-01-473-2455
NSN 5950-00-176-2874
NSN 6130-01-014-1365
NSN 6620-01-144-0827
NSN 6610-00-226-4710
NSN 4140-00-528-2921
NSN 5975-01-458-4909
NSN 5905-01-542-5475
NSN 5975-01-440-9989
NSN 6685-00-082-3153