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 5950-01-642-0148
NSN 5999-01-149-3583
NSN 5910-00-783-7088
NSN 5990-01-199-2846
NSN 6645-00-454-0930
NSN 6135-01-391-6515
NSN 6150-01-595-9632
NSN 6240-00-827-0889
NSN 5985-01-661-3156
NSN 5998-00-765-2244
NSN 6610-00-548-3452
NSN 5960-00-636-4834