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 6620-00-224-7739
NSN 5985-01-157-9426
NSN 6320-01-274-2501
NSN 4140-00-604-4826
NSN 5925-01-242-5999
NSN 5915-01-067-8604
NSN 5990-01-368-2604
NSN 5930-01-234-2099
NSN 2925-01-444-6676
NSN 5990-01-616-9342
NSN 6240-01-649-1520
NSN 5950-01-139-6830