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 5920-01-258-6360
NSN 5999-01-334-5506
NSN 2925-00-877-4307
NSN 4140-01-522-9932
NSN 5920-01-519-6237
NSN 6620-01-121-4019
NSN 5910-01-448-9404
NSN 6620-00-255-5962
NSN 6610-01-417-3011
NSN 5935-00-760-3796
NSN 5996-01-226-0606
NSN 7035-01-440-1862