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 5925-01-493-4961
NSN 5985-01-422-1552
NSN 2925-00-617-0826
NSN 5998-01-228-9387
NSN 5920-01-575-4336
NSN 5990-00-975-0559
NSN 6105-00-935-2700
NSN 6610-01-324-5221
NSN 6320-01-265-0665
NSN 6105-01-334-3266
NSN 6685-00-781-2527
NSN 5950-01-344-8844