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 5990-01-360-0711
NSN 5835-01-394-3812
NSN 5950-01-228-4406
NSN 6110-01-341-6138
NSN 6130-01-088-2716
NSN 6150-00-495-0015
NSN 6110-01-571-4618
NSN 5895-00-586-1068
NSN 5920-01-591-1670
NSN 5935-00-555-0285
NSN 5990-01-478-8638
NSN 6645-01-312-8601