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 5915-00-793-0227
NSN 4140-01-149-2818
NSN 4140-01-020-6026
NSN 4140-01-103-2216
NSN 5915-01-622-9544
NSN 5925-01-229-6342
NSN 6620-01-386-5914
NSN 6135-01-326-2536
NSN 6645-01-646-2953
NSN 5945-00-226-8560
NSN 5998-01-363-0027
NSN 7035-01-424-7019