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 5999-01-187-2096
NSN 5990-01-443-2931
NSN 6650-00-707-1417
NSN 6685-01-119-3459
NSN 6130-00-891-2869
NSN 5985-00-631-2210
NSN 6610-00-629-1883
NSN 6135-01-142-6456
NSN 5935-01-173-7787
NSN 4140-01-555-8190
NSN 6610-00-943-5588
NSN 5930-01-547-0628