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 5990-01-582-1977
NSN 6135-01-633-8502
NSN 5975-01-478-0302
NSN 5990-01-314-8591
NSN 5975-01-485-0546
NSN 5920-01-594-6994
NSN 6610-01-611-5323
NSN 6105-01-360-9624
NSN 6220-01-333-4415
NSN 6240-00-097-8505
NSN 6645-01-268-7265
NSN 5945-01-158-2216