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 5910-01-440-3450
NSN 5915-00-432-0645
NSN 6150-01-207-1939
NSN 2925-01-532-2477
NSN 6685-00-165-5893
NSN 6610-00-462-0717
NSN 4140-01-413-3924
NSN 7035-01-378-5074
NSN 6685-00-252-3057
NSN 5975-01-517-2938
NSN 5975-00-678-5958
NSN 5990-00-932-3070