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 6645-01-337-1806
NSN 4140-01-265-3736
NSN 2925-01-248-2005
NSN 6135-01-486-1443
NSN 5945-01-578-0924
NSN 5925-00-994-7331
NSN 5945-01-063-7495
NSN 6320-01-202-8761
NSN 2925-00-943-2263
NSN 6645-01-449-0785
NSN 2925-00-063-5898
NSN 6150-00-455-0033