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 6240-01-013-4572
NSN 5985-01-299-5352
NSN 5999-00-657-4747
NSN 6130-01-254-4650
NSN 6130-01-188-0330
NSN 6685-01-375-1524
NSN 6150-01-243-6266
NSN 5945-01-467-9234
NSN 5960-01-413-3877
NSN 5960-00-864-2883
NSN 4140-01-512-8528
NSN 6135-00-375-6861