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 5990-01-147-5225
NSN 6610-01-121-0190
NSN 5925-00-925-6126
NSN 5975-00-857-5464
NSN 2925-01-217-0465
NSN 6130-01-288-3041
NSN 5965-00-560-5804
NSN 6645-01-130-2391
NSN 5990-01-159-5988
NSN 6135-01-394-4160
NSN 5915-00-814-8937
NSN 4140-01-334-1597