S-97478A137 M20 x 70 mm DIN 6914, ISO 7412 Metric High-Strength Steel Heavy Hex Head Screws for Structural Applications

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with hot-dipped galvanized steel coating, ideal for outdoor or harsh industrial environments
• High tensile strength of 150,000 psi and Class 10.9 grade ensures reliable performance in heavy-duty structural applications
• Durable Rockwell C32 hardness provides excellent wear resistance and long service life under repetitive stress
• Coarse 2.5 mm pitch threading allows for faster installation and secure holding power in various materials
• Partially threaded design offers optimal grip length control and prevents over-tightening in precision assemblies
• External hex drive and hex head enable easy installation with standard tools, reducing assembly time and labor costs
• Compliance with DIN 6914/ISO 7412 standards guarantees dimensional accuracy and interchangeability in global engineering projects

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these M20 hex head screws deliver superior performance in construction, machinery, and structural steel connections. The hot-dipped galvanized steel material provides a robust barrier against rust and chemical exposure, extending service life in corrosive environments like marine or chemical processing plants. With a Class 10.9 strength grade and 150,000 psi tensile strength, they withstand high vibration and dynamic loads, preventing joint failure in heavy equipment. The coarse metric thread and partial threading ensure quick alignment and secure fastening in thick materials, reducing installation errors. Ideal for external hex drive systems, these screws offer reliable torque transmission, making them a top choice for bolted connections requiring repeatable disassembly and maintenance.

Specification Summary & Compliance

This M20x2.5 hex head screw features precise Class 6g thread fit and coarse thread spacing per metric standards, ensuring consistent engagement and load distribution. Manufactured to meet DIN 6914 and ISO 7412 specifications for dimensional accuracy and mechanical properties, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material traceability in industrial supply chains.