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 5975-01-388-2153
NSN 4140-01-589-4307
NSN 2925-00-759-5465
NSN 6645-01-550-9669
NSN 6645-00-269-2764
NSN 5930-01-425-4010
NSN 5965-01-253-8699
NSN 6685-01-368-2722
NSN 6645-01-157-9103
NSN 6320-01-067-0474
NSN 5990-01-292-6000
NSN 6240-01-307-5094