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 5920-00-757-6144
NSN 5905-01-322-5490
NSN 4140-01-555-8150
NSN 5925-01-084-3165
NSN 5835-01-192-4165
NSN 5935-00-163-0009
NSN 5915-00-256-0040
NSN 6620-00-153-0982
NSN 5915-01-356-2037
NSN 5996-01-227-7497
NSN 5920-01-452-7268
NSN 5990-00-959-8280