A4 M4 x 40 HX SET DIN 933 316 ST/ST is a high-quality stainless steel fastener engineered for superior durability and corrosion resistance. Manufactured to DIN 933 standards, this hex set is designed for demanding environments such as marine, construction, and industrial applications. Its hexagonal head allows for secure tightening with standard tools, ensuring a reliable and stable fastening solution. With excellent tensile strength, it provides dependable performance in structural and mechanical assemblies. Ideal for projects requiring resistance to rust, extreme weather, and chemicals, this fastener is a durable choice for professional and DIY applications.