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 5925-00-170-4090
NSN 5975-01-521-6180
NSN 5985-00-402-3804
NSN 6620-01-379-3300
NSN 5965-01-286-6548
NSN 6220-00-186-8565
NSN 6145-01-292-8719
NSN 6685-00-452-6257
NSN 5960-00-678-9851
NSN 5998-01-419-6950
NSN 5985-01-186-0807
NSN 7035-01-045-1272