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 6320-01-495-0512
NSN 4140-01-150-4895
NSN 4140-01-019-0555
NSN 5996-01-092-9873
NSN 5925-01-152-2690
NSN 5950-01-022-0159
NSN 5915-01-281-7383
NSN 6240-01-025-1208
NSN 5895-00-422-3308
NSN 6610-01-014-3964
NSN 6220-00-472-8119
NSN 6145-01-412-7517