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 6685-00-286-1132
NSN 5999-00-378-9680
NSN 6110-01-047-7730
NSN 5905-00-988-7250
NSN 5975-01-296-4666
NSN 6320-01-492-1976
NSN 5855-01-147-4785
NSN 6150-00-283-3884
NSN 6150-00-100-9226
NSN 6645-01-421-4007
NSN 6135-00-416-2898
NSN 5910-00-509-9973