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 6150-01-211-5150
NSN 6685-01-304-7310
NSN 5855-00-832-9341
NSN 6150-01-545-4424
NSN 6145-00-932-1950
NSN 6685-01-634-0611
NSN 4140-00-690-5288
NSN 6105-00-933-8317
NSN 5895-00-455-8952
NSN 5925-00-264-6256
NSN 5905-00-266-0975
NSN 7035-00-574-4223