Philips countersunk head partial threads Chipboard Screw , 2/3 threads and harden steel , nickel coated . Proudct Decription 1. Material : Carbon steel 1010 2. Hot treatment : HV650 3. Depth of Coating : 0.01mm min, 4. Sharp point : 23 degree 5. Thread angle : 40 degree 6. Size : 4.5x50 7. Colour : Brown |