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 4140-01-485-0083
NSN 5895-01-317-6232
NSN 5965-01-653-4923
NSN 6650-00-371-8050
NSN 6150-01-007-7136
NSN 5990-01-416-1017
NSN 5996-01-482-2214
NSN 5950-01-278-0655
NSN 5895-01-303-8375
NSN 6685-00-293-6620
NSN 6145-00-170-5274
NSN 6150-01-238-1047