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 5960-01-192-7710
NSN 4140-01-145-0122
NSN 6135-01-529-2180
NSN 6150-00-998-2901
NSN 5855-01-180-5369
NSN 5855-00-763-2155
NSN 5985-01-310-8473
NSN 5895-01-583-8879
NSN 5835-00-180-7555
NSN 5950-00-209-6247
NSN 2925-00-519-0766
NSN 6150-01-465-4397