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 5925-01-487-7629
NSN 6685-00-033-7933
NSN 5965-01-517-8198
NSN 5975-01-210-8885
NSN 6650-00-569-1762
NSN 6145-01-374-5217
NSN 4140-01-043-8556
NSN 6320-01-643-0850
NSN 5920-01-502-5838
NSN 5930-01-413-1004
NSN 7035-01-476-7316
NSN 6650-00-420-3593