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 5925-00-775-1717
NSN 6240-00-455-7640
NSN 5945-01-465-3186
NSN 6650-01-464-5033
NSN 6145-00-990-3003
NSN 6645-01-368-7109
NSN 7035-01-631-4067
NSN 6320-00-174-1362
NSN 6135-01-185-3614
NSN 5950-00-003-8731
NSN 4140-01-509-6099
NSN 5996-01-207-5058