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 2925-01-446-0525
NSN 5915-01-384-3858
NSN 6320-01-361-7467
NSN 5960-00-479-0063
NSN 5975-00-274-5720
NSN 5930-00-007-7939
NSN 6645-01-547-0300
NSN 5990-01-392-8842
NSN 6240-00-456-2578
NSN 6220-00-935-6881
NSN 5925-00-018-6646
NSN 4140-00-479-3949