A4 M6 X 100 CUP SQUARE DIN 603 316 SS is a high-quality stainless steel fastener designed for superior durability and resistance to corrosion. Manufactured to DIN or ISO standards, this fastener ensures secure and reliable performance in various applications. Ideal for marine, industrial, and construction use, it offers exceptional strength and longevity. Perfect for projects requiring high tensile strength, stability, and resistance to rust and chemicals.