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 5950-01-351-5365
NSN 5925-01-068-2887
NSN 5990-00-824-4133
NSN 5915-00-633-1217
NSN 6685-00-879-4530
NSN 6135-01-562-6582
NSN 6645-01-473-3752
NSN 6240-00-226-5970
NSN 6150-01-170-4953
NSN 6685-01-429-1279
NSN 5965-00-106-3195
NSN 6130-01-210-2219