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 6150-01-252-8244
NSN 6620-01-031-8180
NSN 6130-00-543-5890
NSN 5905-01-627-9322
NSN 5950-00-215-9161
NSN 5950-01-400-5942
NSN 5915-01-519-2234
NSN 5930-00-349-2234
NSN 5975-00-814-6844
NSN 5910-01-160-7848
NSN 5905-01-501-9000
NSN 5920-01-604-2803