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 5930-01-627-9937
NSN 4140-01-329-9523
NSN 6645-01-196-6277
NSN 6135-00-375-6861
NSN 6135-00-161-0746
NSN 6610-01-340-0409
NSN 5910-01-140-4710
NSN 6220-01-074-6948
NSN 5975-01-368-3386
NSN 6650-01-170-4397
NSN 5960-01-011-6358
NSN 6105-00-460-0335