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 5975-00-014-0784
NSN 5990-00-442-7603
NSN 6685-01-561-3810
NSN 5990-00-647-4008
NSN 5985-01-461-8575
NSN 5960-01-442-1770
NSN 5985-01-429-0876
NSN 6150-00-678-6124
NSN 6620-00-613-3023
NSN 5975-01-075-1977
NSN 6110-00-557-8631
NSN 6650-01-535-6287