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 5990-01-139-6042
NSN 6220-01-352-5425
NSN 5945-00-859-1963
NSN 6320-01-443-8676
NSN 6685-01-130-6730
NSN 6135-00-196-5267
NSN 6610-00-456-0485
NSN 6240-01-356-6911
NSN 5965-01-095-9767
NSN 6620-00-468-6059
NSN 5998-01-490-1815
NSN 5915-01-420-6615