M4-M6 Phillips Mushroom Head Screw Bolts Large Flat Head 201 Stainless Steel Specifications: M4*20 (thread diameter=4mm*length=20mm) including head length Product name: Phillips Mushroom Head Screw Material: 201 stainless steel Size: M4 M5 M6 Product features: The product is made of 201 stainless steel, which has the characteristics of good corrosion resistance, oxidation resistance, heat resistance, high strength and high toughness. Scope of application: 201 stainless steel is widely used in seawater equipment, chemical industry, dyestuff, papermaking and other industries. It has a wide range of applications and is popular in various