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 4140-01-146-5409
NSN 6685-00-630-0736
NSN 6685-01-329-4553
NSN 5985-00-296-7656
NSN 6685-01-462-1770
NSN 5965-00-682-2575
NSN 5925-01-073-9736
NSN 6145-00-401-2106
NSN 5935-01-414-3879
NSN 5930-01-455-5085
NSN 5996-01-140-4424
NSN 5915-00-217-6517