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 5930-01-115-1087
NSN 5975-01-449-1462
NSN 5996-01-605-9837
NSN 5925-01-228-4534
NSN 5960-00-158-4841
NSN 5905-01-571-7767
NSN 5990-00-471-4975
NSN 5960-00-630-4609
NSN 5975-01-331-8196
NSN 6620-00-335-7437
NSN 6645-01-654-2727
NSN 4140-01-117-1960