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 5925-01-155-5520
NSN 5905-01-019-8979
NSN 5985-01-081-2617
NSN 5996-01-408-6779
NSN 5996-00-406-4951
NSN 5998-00-472-4928
NSN 5895-01-113-9297
NSN 5945-01-191-7037
NSN 6150-00-164-8900
NSN 5996-01-462-0112
NSN 6240-01-415-6004
NSN 4140-00-596-4726