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 5990-00-202-5127
NSN 5930-01-449-0039
NSN 5945-00-144-3186
NSN 6150-01-496-0687
NSN 2925-00-836-9543
NSN 5930-00-808-4535
NSN 4140-01-225-8599
NSN 6650-01-390-3205
NSN 5945-01-354-3425
NSN 5950-00-139-2942
NSN 5965-01-309-4368
NSN 5965-01-286-4341