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 4140-01-390-9552
NSN 5950-00-563-0400
NSN 6105-00-469-2293
NSN 5925-00-735-1350
NSN 5960-01-481-8051
NSN 6650-01-475-0078
NSN 5945-00-989-2538
NSN 5950-01-334-4406
NSN 5990-00-965-0495
NSN 5950-01-208-1236
NSN 6145-00-225-8709
NSN 5950-01-519-5361