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 5855-00-446-5921
NSN 5975-01-273-0209
NSN 5930-00-009-3276
NSN 6110-01-051-4898
NSN 6645-01-520-4455
NSN 6620-01-231-3528
NSN 5905-00-843-4283
NSN 6135-01-056-4609
NSN 5855-01-440-0505
NSN 4140-01-302-7486
NSN 6130-01-546-1011
NSN 5950-00-086-7159