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 5945-01-137-9810
NSN 6220-01-624-2129
NSN 2925-01-135-8377
NSN 6150-00-776-2738
NSN 5990-01-485-0260
NSN 5999-00-841-5151
NSN 2925-00-989-0523
NSN 5999-01-604-8551
NSN 6645-01-310-7348
NSN 5910-00-526-0694
NSN 6130-00-621-7997
NSN 5950-01-251-7637