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 4140-01-160-7666
NSN 6110-01-466-7539
NSN 5945-01-130-9501
NSN 5975-00-045-9819
NSN 5999-00-827-0703
NSN 6240-01-053-0666
NSN 2925-00-246-3077
NSN 6685-01-147-4462
NSN 6645-01-394-5149
NSN 6145-01-501-4228
NSN 6135-00-209-6918
NSN 6220-01-021-5096