S-90447A143 M18 x 110 mm DIN 931 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 10.9 strength rating and 150,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance and durability thanks to the black steel construction and Rockwell C32 hardness
• Easy installation and removal with external hex drive and standard 27mm head width for common tool compatibility
• Optimized thread engagement through coarse M18x2.5mm threading and Class 6g fit ensuring secure fastening
• Versatile partial threading design providing both threaded and unthreaded sections for precise clamping control
• Compliance with international standards including DIN 931 specifications for consistent quality and performance
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance meeting global regulatory requirements

Professional Applications & Engineering Value

This M18 hex head screw delivers critical engineering solutions for heavy-duty industrial applications where failure is not an option. The Class 10.9 steel construction provides exceptional tensile strength (150,000 psi) and hardness (Rockwell C32) to withstand extreme vibration, dynamic loads, and harsh operating conditions. The metric coarse threading (M18x2.5mm) ensures rapid installation and superior resistance to loosening in structural steel connections, machinery assembly, and equipment manufacturing. The partially threaded design allows for precise clamping force distribution, preventing joint slippage while the external hex drive facilitates high-torque installation with standard tools. Engineered to DIN 931 specifications, these black steel screws offer reliable performance in construction, automotive, and industrial machinery applications requiring high-strength fastening solutions.

Specification Summary & Compliance

This fastener maintains precise Class 6g thread fit tolerance according to metric standards with M18x2.5mm coarse threading and right-hand thread direction. Manufacturing complies with DIN 931 specifications ensuring dimensional accuracy including 27mm head width, 11.5mm head height, and 110mm total length with 37mm minimum thread length. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations for environmental safety and restricted substances. The Class 10.9 strength rating confirms adherence to international mechanical property standards for high-strength fasteners.