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 4140-00-950-0618
NSN 5960-00-627-6911
NSN 6220-00-395-1461
NSN 5945-00-172-3120
NSN 5835-01-281-7281
NSN 6135-00-930-5372
NSN 5950-01-605-1386
NSN 6240-01-063-7685
NSN 5905-01-229-2620
NSN 5985-01-261-2805
NSN 6135-00-168-9352
NSN 7035-00-205-1932