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 5990-01-544-4360
NSN 5925-01-012-1890
NSN 5950-00-724-7107
NSN 5895-00-535-2576
NSN 5996-00-693-9568
NSN 6645-01-347-4865
NSN 6135-00-405-1989
NSN 5895-00-064-6610
NSN 5990-01-491-7692
NSN 5935-01-026-0851
NSN 6620-01-392-7191
NSN 6135-00-010-5275