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 6150-01-429-2924
NSN 6320-01-387-3230
NSN 5998-00-065-9996
NSN 5925-01-022-9733
NSN 4140-01-344-5368
NSN 5945-00-619-3553
NSN 5910-01-149-4247
NSN 5990-01-400-3299
NSN 5935-00-284-3984
NSN 5999-00-421-0619
NSN 5975-01-054-1196
NSN 5985-00-930-0725