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 6620-01-391-7331
NSN 4140-01-529-6811
NSN 6645-00-248-5434
NSN 5998-01-426-5238
NSN 5999-01-262-4816
NSN 5990-01-407-6615
NSN 5965-01-332-6693
NSN 5930-01-607-6620
NSN 5999-01-653-8511
NSN 5990-00-067-6791
NSN 6145-00-207-8858
NSN 5950-01-157-6619