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 6220-01-339-0527
NSN 5990-01-503-0194
NSN 6130-01-615-5099
NSN 4140-00-707-5963
NSN 6240-01-480-5897
NSN 5975-01-364-0000
NSN 6150-01-608-3590
NSN 6320-01-445-5893
NSN 5950-01-316-9342
NSN 6145-01-421-4257
NSN 5960-00-900-6705
NSN 5990-00-161-2797