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 5930-01-574-7971
NSN 5998-00-967-2500
NSN 5950-01-494-9778
NSN 6240-01-461-4429
NSN 5925-01-310-3667
NSN 6130-01-511-3863
NSN 5915-00-203-2859
NSN 6685-00-911-8374
NSN 2925-00-233-5644
NSN 4140-00-295-0787
NSN 6620-00-498-7781
NSN 6685-01-300-2630