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 6150-01-171-4959
NSN 5905-00-160-6856
NSN 5950-01-529-6542
NSN 6645-00-456-2923
NSN 5920-00-243-9506
NSN 5985-01-350-3709
NSN 5855-01-508-6917
NSN 5950-01-245-6189
NSN 4140-01-046-4932
NSN 5945-00-806-3020
NSN 5855-00-688-9954
NSN 2925-01-077-3310