... are used in the automobile, construction equipment hydraulic industry and etc.1. Material Available: Copper, Brass, Aluminum, Stainless Steel, Steel alloy ... 3. Precision: +/-0.01mm4. Processing: turning, milling, drilling,casting,stamping etc.5. Equipment: CNC lathe, automatic lathe, hand lathe, thread rolling ... call us at:Tel: 86-757-26385090TM: changzedianqi Phillips Recessed Pan Head Tapping Screws