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 6240-01-400-0570
NSN 4140-01-550-8030
NSN 4140-01-283-1275
NSN 5999-01-188-7811
NSN 6650-00-914-6897
NSN 5910-01-302-1993
NSN 6685-00-432-2451
NSN 5855-00-951-6483
NSN 5950-00-495-4663
NSN 5935-01-651-3901
NSN 6685-00-715-9254
NSN 5930-00-914-0066