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 5975-01-431-8814
NSN 5965-00-362-2158
NSN 5975-00-245-2286
NSN 5996-00-166-8095
NSN 5998-00-082-8796
NSN 5855-01-246-4274
NSN 2925-01-509-3783
NSN 6220-01-397-0435
NSN 4140-01-621-0256
NSN 6145-00-932-1950
NSN 5905-00-758-7091
NSN 6135-01-391-6515