Flat Head, Square Body, Open End, M6, RoHS plating Type: flat head/ thin head/countersunk head circular body/knurled body/full-hex body/half-hex body/open-end/ closed-endSize: Metric thread: M3~M12 Inch Thread: UNC6-32~1/2-13Material: steel, aluminium, stainless steel, brassPlating: Yellow Zinc Plating, White Zinc Plating, Black Zinc Plating