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 5996-01-512-5595
NSN 5996-01-360-7116
NSN 5960-01-133-3551
NSN 4140-00-990-1919
NSN 5975-01-054-8859
NSN 6610-00-886-3652
NSN 6105-01-384-3687
NSN 6240-01-107-9795
NSN 5999-00-122-8817
NSN 6220-00-157-5009
NSN 6135-00-452-2266
NSN 5998-01-406-2622