Made of high-strength, rust-resistant #45 steel, this coupling withstands continuous operation in DIY and light industrial environments. The hardened set screws provide a secure, vibration-resistant grip on your shafts. Specifications: Inside Diameter: 6mm Shaft Outside Diameter: 0.39 /10mm Outside Diameter: 0.87 /22mm Length: 0.47 /12mm Thread: M3 Material: #45 Steel Color: Silver Quantity: 4 Pieces Note: Due to manual measurement, please allow a deviation of 1 - 2mm. Package included: 4 x 6mm flange shaft coupling, 8 x M3 fastening screws, 1 x M3 hex wrench. Shaft outside diameter: 0.39 /10mm, outside diameter: 0.87 /22mm, length: 0.47 /12mm, thread: M3. Solid-built: The rigid flange coupling is made of grade 45 carbon steel, it is high-strength and sturdy. The heat treatment and electroplating process ensure exceptional tensile strength, corrosion resistance, and long-term durability. Precision alignment: The flange coupling ensures a secure, zero-slip connection between motor and drive shafts. This minimizes vibration and energy loss, delivering smoother operation, improved efficiency, and longer component life for your cars, drones, and boats. Easy installation: Designed for hassle-free setup and maintenance. The package includes 4pcs flange couplings, 8pcs fastening screws, and a hex wrench. Simply align the shafts, tighten the screws, and achieve a solid mount in minutes. Wide applications: The universal rigid flange design is suitable for securing motor shafts, mounting pulleys, or attaching other accessories on a flat surface. An essential part for RC cars, trucks, drones, and DIY projects. ASIN B0GD55DSBD Brand suiwotin Color Silver Set Name 4pcs 6mm Flange Coupling Connector Set Size Name 6mm Metal Type Carbon Steel Unit Count 1 Count Item Weight 0.04 kg Part Number EKIS2004s001 Thread Size M3 Thread Type Iso Metric Finish Types Chrome or Zinc Plating Grade Rating industrial Manufacturer suiwotin Thread Class Fine Thread Style M3 (External) Fastener Type Flange Item Diameter 6 millimeters Material Type Carbon Steel Item Highlight with Set Screws & Wrench, for RC Car, 3D Printer Motor & DIY Models Exterior Finish Chrome or Zinc Plating Number Of Items 4 Number of Packs 4 Number of Pieces 4 Outside Diameter 22 millimeters Inside Thread Size M3 Compatible Groove Diameter 6 millimeters