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 5905-01-235-5512
NSN 5925-01-317-1824
NSN 5930-01-594-1661
NSN 5975-00-885-9006
NSN 6645-00-258-8547
NSN 6150-01-455-6175
NSN 6145-00-419-0550
NSN 6150-01-501-1062
NSN 6685-01-146-9710
NSN 6685-01-230-8676
NSN 5930-00-375-6755
NSN 6220-00-755-7546