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 5905-01-351-4651
NSN 5950-01-460-1032
NSN 5975-01-359-5584
NSN 6320-01-246-4390
NSN 7035-01-587-7832
NSN 6150-00-232-3145
NSN 5935-00-458-1379
NSN 6130-01-310-6296
NSN 5945-00-554-9351
NSN 6240-01-048-8172
NSN 2925-00-420-8151
NSN 4140-01-517-8179