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 4140-01-553-5767
NSN 5915-00-779-3475
NSN 6240-00-072-9966
NSN 5930-01-123-6693
NSN 5998-01-222-1417
NSN 5905-00-894-8702
NSN 5930-01-529-1968
NSN 5999-01-529-0836
NSN 5975-01-151-6870
NSN 5990-01-647-8574
NSN 6645-01-239-1433
NSN 6320-01-345-5818