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 5925-01-176-5048
NSN 5920-01-519-8106
NSN 6610-00-034-3709
NSN 6240-01-231-9243
NSN 6320-01-032-9703
NSN 5895-00-752-6171
NSN 6145-00-504-2382
NSN 6145-00-470-8255
NSN 6620-00-919-6710
NSN 4140-01-648-2249
NSN 5985-01-525-7624
NSN 6220-01-237-2488