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 5920-00-407-0310
NSN 5945-01-487-8536
NSN 5835-01-227-2318
NSN 6150-01-581-6548
NSN 6145-00-369-3871
NSN 6220-00-369-5422
NSN 2925-00-056-7112
NSN 6105-01-521-9168
NSN 5895-01-206-2664
NSN 6220-00-484-5937
NSN 6620-01-218-8048
NSN 5990-00-965-0495