8848-16 Dummy spindles for non-turning doorknobs Finish/Color: Zinc plated steelMaterial: SteelDimensions: 9/32" wideTimeline: Late 19th Century, Early 20th Century SKU: 8848-16-749 Category: Doorknob Spindles Tag: Zinc plated steel Description Description Dummy spindles for doorknobs. Steel. Zinc plated. These spindles have a coarser thread, as many old doorknobs did. 1-1/8″ long , Width: 9/32″ (7mm) square , Thread: 3/8″ – 16 1″ base diam.