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 5950-01-401-5321
NSN 5999-01-568-3940
NSN 5975-00-862-2495
NSN 6150-00-516-4223
NSN 5990-00-775-0224
NSN 6240-01-486-0789
NSN 5996-01-455-2198
NSN 5915-00-690-9801
NSN 5999-00-451-4326
NSN 5905-00-294-0927
NSN 5985-00-225-9074
NSN 5855-00-198-3197