S-90447A142 M18 x 85 mm 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 under heavy loads, reducing the risk of fastener failure in critical applications.
• Class 10.9 strength grade provides superior durability and fatigue resistance, ideal for high-stress industrial environments.
• Partially threaded design offers optimal clamping force and vibration resistance, preventing loosening in dynamic assemblies.
• Coarse metric thread (M18x2.5) with Class 6g fit enables quick installation and secure fastening, saving assembly time and labor costs.
• External hex head allows for standard tool compatibility and high torque application, ensuring easy and efficient installation.
• Rockwell C32 hardness enhances wear resistance and longevity, minimizing replacement needs and maintenance downtime.
• Compliance with DIN 931 guarantees dimensional accuracy and interchangeability, ensuring consistent quality across batches.

Professional Applications & Engineering Value

This M18 hex head screw is engineered to address common industrial challenges such as joint integrity and long-term reliability. Made from high-grade steel with a Class 10.9 rating, it delivers robust performance in heavy machinery, structural frameworks, and automotive assemblies where high tensile strength is critical. The partially threaded configuration concentrates clamping force on the unthreaded shank, reducing stress concentration and improving resistance to vibration loosening. With a coarse metric thread and external hex drive, it ensures rapid installation and removal, enhancing productivity in maintenance and production lines. Its black finish provides basic corrosion resistance, making it suitable for indoor and protected outdoor applications where durability and compliance with DIN 931 standards are essential for safety and performance.

Specification Summary & Compliance

This screw adheres to precise dimensional tolerances, including a Thread Fit of Class 6g per metric standards, ensuring consistent thread engagement and assembly reliability. It conforms to DIN 931 specifications for hex head bolts, covering dimensions, materials, and mechanical properties. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances, which is vital for global supply chains and industrial applications requiring certified components.