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 6645-01-554-7557
NSN 6240-01-369-6464
NSN 6105-01-530-3596
NSN 6685-01-068-7704
NSN 4140-01-361-9198
NSN 7035-00-193-2269
NSN 5930-01-461-2229
NSN 5925-00-168-1459
NSN 7035-01-038-3165
NSN 6130-01-258-1134
NSN 6240-01-211-4507
NSN 5855-00-149-0766