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 5915-00-173-4226
NSN 5975-00-156-5737
NSN 5930-00-248-3461
NSN 7035-00-908-4933
NSN 5855-00-411-8688
NSN 4140-00-660-8699
NSN 6145-01-650-9410
NSN 5960-00-275-7497
NSN 6135-01-472-9011
NSN 5998-00-042-8192
NSN 5975-00-216-4848
NSN 5930-01-049-1886