S-91310A158 M20 x 90 mm ISO 4017, DIN 933 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity: Class 10.9 high-tensile steel construction ensures superior strength for heavy-duty applications, withstanding up to 150,000 psi tensile stress without failure.
• Enhanced Durability & Wear Resistance: Rockwell C32 hardness provides excellent resistance to deformation and wear, extending service life in high-vibration environments.
• Optimized Thread Engagement: Fully threaded M20 coarse pitch (2.5 mm) design offers faster assembly and improved grip in various materials, reducing installation time.
• Secure Torque Application: External hex drive with 30 mm head width allows for high-torque tightening using standard tools, minimizing slippage risks.
• Reliable Fit & Interchangeability: Class 6g thread fit and compliance with ISO 4017/DIN 933 standards ensure precise, consistent performance and compatibility with metric components.
• Corrosion-Resistant Finish: Black surface treatment enhances corrosion protection, suitable for industrial and outdoor applications.
• Regulatory Compliance Assurance: Meets RoHS 3 and REACH environmental standards, ensuring safe use in regulated industries.

Professional Applications & Engineering Value

Engineered for demanding industrial and construction environments, this M20 hex head screw addresses critical challenges in structural integrity and assembly efficiency. The Class 10.9 high-tensile steel and fully threaded metric coarse thread design provide exceptional clamping force and vibration resistance, preventing joint loosening in machinery, steel frameworks, and heavy equipment. The external hex drive enables quick installation with common tools, while the Rockwell C32 hardness ensures durability under repetitive stress. Ideal for applications requiring reliable fastener strength and compliance with international standards, it reduces maintenance needs and enhances project safety in automotive, infrastructure, and manufacturing sectors.

Specification Summary & Compliance

This fully threaded hex bolt features precise M20x2.5 coarse threads with Class 6g tolerance, ensuring accurate fit and performance. Manufactured to ISO 4017/DIN 933 specifications for dimensional consistency, it guarantees interchangeability in metric assemblies. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial use.