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 5975-01-204-7916
NSN 5855-00-869-3635
NSN 5925-00-491-2363
NSN 6145-00-334-8635
NSN 2925-01-439-0219
NSN 5960-00-597-2680
NSN 5990-00-543-2755
NSN 6620-01-219-0923
NSN 5905-01-609-5277
NSN 6620-01-195-3355
NSN 5855-01-627-7577
NSN 6610-00-925-5064