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 5855-01-631-4331
NSN 5998-01-447-9759
NSN 5965-00-665-2156
NSN 5925-00-411-5170
NSN 6145-00-188-3657
NSN 6220-01-461-9643
NSN 6685-01-051-3054
NSN 6150-01-013-9159
NSN 5905-01-429-0102
NSN 5960-01-347-0634
NSN 4140-00-244-2365
NSN 5960-01-595-2614