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 5915-01-463-9241
NSN 5925-00-056-6488
NSN 5960-00-406-4333
NSN 4140-01-455-3350
NSN 2925-01-004-1683
NSN 5855-00-466-2309
NSN 5945-01-030-6396
NSN 5835-00-494-7204
NSN 6240-01-463-8276
NSN 5996-01-615-1195
NSN 5855-00-928-1912
NSN 6685-00-375-1526