QUARKZMAN Landing Sprocket Steel Axle

What is it? Widely used for RC aircraft, wheel drive shaft, motorcycle wheel axle, remote control and helicopter landing gear, steel drive axles of undercarriage are made of metal, etc. What will I get? Smooth surface diameter: 4mm/0.16 inch Smooth surface length: 32mm/1.26 inch Total length: 43 mm/1.7 inch Thread size: M4*0.7mm Locking Hex Nut: 7 x 5mm/0.28 x 0.2 inch (W*H) In the package: The 5pcs steel drive axle comes with a lock of 5pcs nuts Does the product have any benefits? More power is provided by the high-strength metal material. Durable and corrosion-resistant. Good workmanship, suitable for fixed wing landing gear. How to use? Comes with locking nuts, easy to install by bolting onto any landing gear. Suitable for fixed wing landing gear. What should I notice? Please allow a slight error as all sizes are measured manually by +/-0.1 inches.