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 2925-00-513-6644
NSN 6130-01-032-6013
NSN 6610-01-100-3662
NSN 5930-01-463-3204
NSN 6685-00-761-9655
NSN 5960-01-391-4701
NSN 5965-01-286-4341
NSN 6620-00-106-9658
NSN 5985-01-432-5889
NSN 4140-00-125-0837
NSN 5920-01-009-1307
NSN 6645-01-210-4388