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 5925-01-270-2736
NSN 5945-01-491-0173
NSN 2925-00-816-8765
NSN 6105-01-070-8625
NSN 6620-00-425-7475
NSN 6110-01-473-4755
NSN 5990-00-518-3195
NSN 4140-01-120-8252
NSN 5910-01-017-6162
NSN 6145-01-179-4501
NSN 5920-00-621-6601
NSN 6240-01-544-1219