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 6650-01-134-8933
NSN 6320-00-164-4087
NSN 6135-00-248-4102
NSN 5945-00-885-9000
NSN 2925-00-261-5800
NSN 5965-01-460-4172
NSN 5910-01-415-5758
NSN 5990-01-642-5748
NSN 5895-01-591-9793
NSN 6135-01-504-4309
NSN 6145-01-305-8646
NSN 6220-01-600-8647