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 5960-00-111-0457
NSN 5975-01-505-8857
NSN 2925-01-043-9786
NSN 6145-01-424-8484
NSN 5925-00-267-3044
NSN 6645-01-416-6267
NSN 5920-01-444-4567
NSN 6110-00-220-3054
NSN 6320-00-098-2858
NSN 5935-01-634-0668
NSN 5999-01-345-6984
NSN 6320-01-578-6006