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 6240-01-157-9128
NSN 4140-01-501-6031
NSN 5935-01-465-6600
NSN 2925-01-043-9786
NSN 5975-01-541-2551
NSN 5965-01-359-8172
NSN 2925-01-520-4194
NSN 5930-00-203-5999
NSN 5935-01-424-0692
NSN 5996-00-161-4202
NSN 5835-00-148-9719
NSN 5915-01-194-5540