A4 M4 X 20 FLANGED SOCKET BUTTON ISO 7380-2 is a high-performance socket button screw crafted from corrosion-resistant A4 stainless steel. Designed to ISO 7380 standards, this fastener offers a low-profile, aesthetically appealing finish while maintaining exceptional strength. The domed head and hexagonal socket provide a secure and reliable fastening option for mechanical, structural, and engineering applications. Perfect for use in marine, industrial, and outdoor settings, it ensures long-term durability, resisting rust, chemicals, and extreme environmental conditions. Ideal for projects requiring a smooth, rounded head design with excellent holding power, this screw delivers both function and style.