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 4140-01-068-5573
NSN 5996-01-413-0229
NSN 5920-01-447-8794
NSN 6610-01-099-9710
NSN 4140-00-555-2579
NSN 6650-01-433-8042
NSN 5925-00-942-0350
NSN 5998-01-370-5926
NSN 5915-00-038-8218
NSN 6220-01-025-1373
NSN 5935-01-382-2091
NSN 5975-01-094-6250