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 4140-01-074-4608
NSN 5975-01-583-2693
NSN 5835-01-481-4204
NSN 6320-00-270-8222
NSN 5998-01-274-0150
NSN 6110-00-660-8998
NSN 5998-01-333-6229
NSN 5996-00-288-1829
NSN 6130-01-055-6219
NSN 5930-00-262-4374
NSN 4140-01-067-8986
NSN 5855-01-278-8922