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 6645-01-518-7287
NSN 6685-00-473-0546
NSN 6240-01-528-6792
NSN 6240-00-146-9322
NSN 5925-00-379-0920
NSN 5996-01-274-1025
NSN 5835-00-368-4182
NSN 6650-00-367-9230
NSN 2925-00-814-8745
NSN 5895-00-455-8033
NSN 4140-01-420-3773
NSN 6620-01-222-5555