S-90854A309 M20 x 50 mm ISO 4017, DIN 933 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength with 150,000 psi rating ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance and replacement costs.
• High-strength Class 10.9 grade and Rockwell C32 hardness provide excellent durability and load-bearing capacity for demanding mechanical assemblies.
• Fully threaded design with coarse 2.5mm pitch offers faster installation and secure holding power across the entire 50mm length.
• Precise Class 6h thread fit ensures smooth engagement and consistent clamping force, improving assembly efficiency and joint integrity.
• External hex drive and standard hex head allow for easy installation with common tools, reducing assembly time and labor costs.
• Compliance with ISO 4017/DIN 933 standards guarantees dimensional accuracy and interchangeability, ensuring compatibility with global engineering specifications.

Professional Applications & Engineering Value

This M20 hex head screw delivers critical engineering value in heavy-duty applications where high tensile strength and corrosion resistance are paramount. The Class 10.9 steel construction, combined with zinc yellow-chromate plating, effectively combats environmental degradation in machinery, structural steelwork, and industrial equipment. Its fully threaded metric coarse thread design ensures maximum grip and vibration resistance, addressing common loosening issues in dynamic loads. The external hex drive facilitates quick installation with standard wrenches, streamlining assembly in automotive, construction, and manufacturing sectors while maintaining compliance with international ISO 4017/DIN 933 specifications for reliable performance.

Specification Summary & Compliance

This fastener features M20x2.5mm coarse threads with Class 6h thread fit tolerance, ensuring precise engagement and consistent performance. Manufactured to meet ISO 4017/DIN 933 standards, it guarantees dimensional accuracy and mechanical properties. The 50mm length and fully threaded design provide uniform clamping force. Compliance with industry specifications ensures reliability, and the product adheres to relevant material and safety regulations for industrial use.