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 5835-01-485-0210
NSN 4140-01-488-1169
NSN 5950-01-113-3763
NSN 5998-01-381-3741
NSN 6110-01-042-4117
NSN 5990-00-754-2842
NSN 6620-01-621-0719
NSN 6645-01-446-1994
NSN 5905-01-191-9793
NSN 6145-00-937-3536
NSN 5950-00-381-8549
NSN 5975-00-925-1197