Compact Size: Model - M4x6mm; Screw Length - 6mm/0.24"; Pitch - 0.7mm/0.028"; Screw Head Diameter - 8mm/0.32"; Inner Hex Diameter - 2.5mm/0.1". Hex Socket Drive: Round head machine screws with hex socket drive for universal use, providing a smooth and secure fastening solution. High-Quality Material: Constructed from durable 304 stainless steel, ensuring excellent strength, wear resistance, and corrosion resistance in challenging conditions. Versatile Applications: Ideal for various industries, including wind power, aerospace, office equipment, petrochemicals, electronics, communications, shipbuilding, and machinery. Convenient Packaging: Each set includes 20 machine screws, offering a sufficient quantity for your fastening requirements.