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 4140-01-532-6257
NSN 5985-00-655-7589
NSN 6130-01-631-8952
NSN 5975-00-008-0636
NSN 6135-00-756-6149
NSN 5920-00-477-1449
NSN 5990-00-288-1820
NSN 5925-00-138-7585
NSN 2925-01-441-8958
NSN 5975-01-128-4380
NSN 6110-00-835-8919
NSN 5920-00-276-8657