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 4140-01-010-2592
NSN 5996-01-455-2198
NSN 5835-01-430-4765
NSN 6145-01-367-1404
NSN 6240-01-542-8886
NSN 6650-00-834-9062
NSN 4140-00-953-2004
NSN 5960-01-536-9763
NSN 6240-01-490-0172
NSN 5920-00-768-1389
NSN 5920-00-473-0563
NSN 5975-00-252-1945