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 6620-01-491-1434
NSN 2925-01-200-8757
NSN 7035-00-679-9027
NSN 5998-01-577-5623
NSN 5930-00-188-1055
NSN 5905-00-267-3120
NSN 5835-00-909-5376
NSN 5945-00-328-7300
NSN 5935-01-570-8017
NSN 5905-01-058-6698
NSN 5990-01-293-4817
NSN 6320-01-335-8336