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 6320-01-609-8903
NSN 5930-01-549-8921
NSN 5990-01-007-3806
NSN 5920-01-135-5486
NSN 6145-00-173-5177
NSN 6105-00-275-0826
NSN 6110-01-005-5140
NSN 5998-00-878-4961
NSN 5855-01-147-6024
NSN 6620-00-783-9560
NSN 5905-01-381-5664
NSN 6320-00-483-0451