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 5925-01-512-9934
NSN 6135-01-445-6157
NSN 2925-01-420-2362
NSN 6130-00-503-2622
NSN 5990-00-003-4464
NSN 5935-01-260-2440
NSN 6150-01-217-2858
NSN 5975-01-181-5679
NSN 5950-01-595-9712
NSN 5895-00-968-1488
NSN 5895-00-764-5384
NSN 6145-00-901-0081