S-90854A325 M20 x 85 mm ISO 4014, DIN 931 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress applications, minimizing the risk of fastener failure.
• Superior corrosion resistance with zinc yellow-chromate plating, extending service life in harsh or outdoor industrial environments.
• High hardness rating of Rockwell C32 provides excellent wear resistance and durability under repetitive loading conditions.
• Class 10.9 strength grade guarantees consistent performance for critical heavy-duty fastening in construction and machinery.
• Partially threaded design allows for precise clamping force and reduces the risk of thread damage during installation.
• Coarse metric thread (M20x2.5) enables quicker assembly and better performance in materials prone to vibration or thermal expansion.
• External hex drive and hex head facilitate easy installation and removal with standard tools, improving maintenance efficiency.

Professional Applications & Engineering Value

Engineered for demanding heavy-duty applications, this M20 hex head screw addresses common industrial challenges such as joint integrity under dynamic loads and environmental exposure. The Class 10.9 steel construction, combined with a Rockwell C32 hardness, ensures that the fastener maintains its structural integrity in high-vibration settings like machinery assembly, structural steel connections, and automotive frameworks. The zinc yellow-chromate plating offers a protective barrier against corrosion, making it ideal for outdoor or humid conditions. With a coarse thread pitch and partial threading, it provides optimal grip in softer materials and reduces the likelihood of cross-threading, enhancing both safety and longevity in construction and industrial projects.

Specification Summary & Compliance

This hex head screw adheres to precise dimensional standards with a Thread Fit Class 6h and coarse thread spacing, ensuring compatibility and ease of assembly. It fully complies with ISO 4014 and DIN 931 specifications, guaranteeing consistent quality and performance. The manufacturing process follows stringent industrial norms, and the product meets common regulatory requirements such as RoHS and REACH for environmental safety, providing assurance for use in regulated sectors.