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 5945-01-243-6198
NSN 5975-00-533-5053
NSN 6320-01-207-0636
NSN 4140-01-563-7656
NSN 6220-00-983-6920
NSN 5910-01-031-9901
NSN 5935-01-554-2352
NSN 6685-01-453-7894
NSN 5920-00-152-4003
NSN 6145-01-014-2670
NSN 4140-01-184-0111
NSN 5990-00-724-8812