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 6620-01-097-7078
NSN 6150-00-284-2976
NSN 5925-01-128-1072
NSN 5920-01-475-9132
NSN 6320-00-403-6003
NSN 5990-01-516-9665
NSN 5999-00-202-0788
NSN 5998-00-857-1463
NSN 5990-00-292-5017
NSN 6240-01-574-3796
NSN 6150-01-122-8261
NSN 6620-01-554-0030