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 5999-00-639-3447
NSN 2925-01-206-7948
NSN 5998-01-459-0405
NSN 6220-01-212-3254
NSN 6240-01-262-0149
NSN 5935-01-113-8315
NSN 2925-01-329-3665
NSN 5996-00-987-9080
NSN 5990-01-421-5342
NSN 5990-01-388-0252
NSN 5855-00-797-8217
NSN 6105-01-232-5262