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 6620-00-438-5833
NSN 2925-01-345-9439
NSN 5990-01-054-4255
NSN 6150-00-141-8793
NSN 5950-00-603-7154
NSN 6320-01-462-2295
NSN 6620-01-491-7001
NSN 6145-00-932-1950
NSN 5950-00-185-5121
NSN 6110-01-570-6387
NSN 6645-00-382-8994
NSN 6620-00-176-5722