Vintage cast iron industrial valve hand wheel. Hand wheels like this are traditionally used to manually operate steam systems, water mains, or gate valves. The number 406021 stamped on the spoke acts as a manufacturer part or casting number to identify the specific valve size, series, and hub configuration.
Dimensions: overall diameter 12" arbor ID 1.77" thickness 1.19" thickness at arbor 1.47" weight 14 lbs