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 4140-01-400-3610
NSN 5935-01-480-9551
NSN 5985-01-314-7977
NSN 6620-01-474-1890
NSN 5905-01-538-4167
NSN 5855-01-372-4433
NSN 2925-01-595-9720
NSN 5930-00-146-4126
NSN 5998-00-463-4463
NSN 5998-01-526-9055
NSN 6130-01-415-4696
NSN 5999-00-596-8745