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 5925-00-226-1155
NSN 5930-00-881-4076
NSN 4140-00-336-1728
NSN 5925-01-441-9512
NSN 6150-01-312-4034
NSN 5996-01-029-6021
NSN 5975-00-132-0989
NSN 6620-00-728-3445
NSN 5999-00-041-3383
NSN 5998-01-105-1769
NSN 4140-01-474-5007
NSN 5895-00-417-5529