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 5990-01-113-8121
NSN 6320-00-593-0379
NSN 6135-00-271-0407
NSN 4140-00-660-8699
NSN 5930-00-239-4975
NSN 5920-00-917-6586
NSN 5998-01-565-1791
NSN 6650-00-910-2708
NSN 6685-00-605-3241
NSN 6145-00-451-0528
NSN 5950-00-492-5874
NSN 4140-01-102-5305