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 6110-00-876-1995
NSN 4140-01-541-7623
NSN 6220-01-020-8018
NSN 6240-01-549-6400
NSN 5920-00-942-0027
NSN 5985-00-948-3491
NSN 2925-01-394-9658
NSN 6150-00-286-0827
NSN 5998-01-551-0503
NSN 6610-00-994-8472
NSN 5975-01-103-2584
NSN 6610-01-444-4001