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 5990-01-563-1554
NSN 6645-01-564-0569
NSN 5925-01-230-3405
NSN 5855-00-446-5921
NSN 5925-01-057-7559
NSN 5935-00-900-1239
NSN 5985-01-053-4164
NSN 6145-01-181-6198
NSN 5965-01-146-6762
NSN 5965-01-107-8549
NSN 5945-01-494-8272
NSN 6620-00-815-2281