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 4140-00-596-4726
NSN 5855-00-256-5562
NSN 5999-01-147-5684
NSN 6650-00-423-2178
NSN 5996-00-187-8072
NSN 5930-01-322-8220
NSN 5915-00-882-5531
NSN 6620-01-488-9547
NSN 5998-01-351-7397
NSN 4140-00-170-5152
NSN 5975-00-826-8982
NSN 5910-01-435-6053