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 6650-00-256-9059
NSN 5910-01-102-8178
NSN 5999-01-408-1108
NSN 5999-01-422-2556
NSN 5920-01-511-6441
NSN 5985-01-593-9274
NSN 5905-01-523-0087
NSN 6135-00-777-5562
NSN 6220-00-270-6996
NSN 5998-01-602-5916
NSN 6135-01-295-8315
NSN 6620-01-007-0103