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 5990-01-443-2931
NSN 6135-00-203-9645
NSN 6150-01-445-4845
NSN 5985-01-364-1149
NSN 5996-01-014-6103
NSN 6620-01-622-4980
NSN 5985-01-507-7463
NSN 5925-01-505-8633
NSN 6645-01-095-9681
NSN 6620-00-663-8962
NSN 5905-01-529-7320
NSN 6650-01-622-8763