Impact Double-Ended Spigot Tweet Description This Double-Ended Spigot from Impact has a universal 5/8" (16mm) diameter and features both 1/4"-20 and 3/8"-16 male threads. Details Additional Category Tags: Mounting Hardware, Studs, Receptors & Pins Category: Lighting & Studio Manufacturer Catalog Number: CA-100 Model: Impact CA-100 Product Manufacturer: Impact Subcategory: Light Stands & Mounting