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 6240-01-160-1070
NSN 5975-00-878-5394
NSN 2925-00-263-2714
NSN 6645-01-473-9179
NSN 6620-00-103-6610
NSN 5945-00-501-1494
NSN 5965-01-592-3051
NSN 5855-00-832-9341
NSN 6145-00-158-8704
NSN 6145-01-244-2760
NSN 5915-00-789-5597
NSN 5960-01-614-8005