1. Spiral Flute Tap: Thread Size: M4 x 0.7 0.03; Square Size: 4mm / 0.16'. Spiral point design, downward chip evacuation, enables fast and precise thread cutting. Titanium coating provides corrosion resistance, enhances wear resistance and hardness, and reduces friction coefficient. 2. Wide Applications: Suitable for machining throughhole threads. Ideal for threading aluminum, tool steel, stainless steel, bronze, and plastics. Recommended feed speeds: general steel: 615m/min; harder steel: 510m/min; stainless steel: 27m/min; cast iron: 810m/min. Excessive feed speed may cause torque, leading to tap breakage. 3. Special Design: Enlarged tap to accommodate workpieces requiring postthreading galvanization or sandblasting. Typically, a 0.030.1mm oversize is used, depending on coating thickness. Features hardness, toughness, wear resistance, and heat resistance. 4. Easy to Use: Compatible with drilling and tapping machines, CNC, and milling machines. Use cutting oil for higherquality threads and longer tap life. Machine taps with overloadprotected tap wrenches are recommended.