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 6320-00-004-9158
NSN 4140-00-395-2525
NSN 6685-01-457-6558
NSN 5910-01-386-6385
NSN 5935-00-864-4677
NSN 6220-01-013-9498
NSN 5965-00-622-7025
NSN 5998-01-420-0956
NSN 6110-01-236-3923
NSN 5915-01-304-2087
NSN 5998-00-620-2593
NSN 5855-01-180-5369