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 5990-01-621-4710
NSN 4140-01-518-0865
NSN 5945-01-558-7667
NSN 6150-01-344-7635
NSN 6135-01-393-4746
NSN 6145-01-005-2384
NSN 6685-01-617-8964
NSN 5985-01-627-8307
NSN 5945-00-974-5627
NSN 6240-01-578-1064
NSN 2925-00-233-5644
NSN 5960-01-322-8417