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 5996-01-578-3757
NSN 6320-01-578-6006
NSN 5910-01-501-0109
NSN 5925-01-228-0604
NSN 6320-00-937-5625
NSN 5960-00-177-2953
NSN 5930-01-172-2355
NSN 6220-00-419-0635
NSN 4140-01-230-5379
NSN 5925-01-274-1294
NSN 5835-00-289-9080
NSN 5965-00-069-8886