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 5915-01-090-4630
NSN 5985-00-737-4538
NSN 6620-00-140-8644
NSN 6105-01-327-4124
NSN 6240-01-367-5756
NSN 6130-00-814-5888
NSN 6220-01-300-3726
NSN 6150-01-566-6521
NSN 2925-01-589-9136
NSN 6130-00-509-1591
NSN 5998-01-401-5396
NSN 6620-01-264-8685