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 4140-01-318-3087
NSN 5960-01-095-2984
NSN 4140-00-810-9330
NSN 5835-00-373-2671
NSN 4140-01-415-3907
NSN 5915-00-336-1644
NSN 6685-01-106-3210
NSN 6135-00-196-5267
NSN 6220-01-516-0454
NSN 7035-00-870-0290
NSN 5930-00-857-8292
NSN 6220-01-281-5464