S-97478A146 M20 x 140 mm DIN 6914, ISO 7412 Metric High-Strength Steel Heavy Hex Head Screws for Structural Applications

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from hot-dipped galvanized steel coating, ensuring long service life in harsh environments
• Superior mechanical strength with Class 10.9 rating and 150,000 psi tensile strength for reliable performance under high-stress conditions
• Optimized load distribution through partially threaded design with 107mm grip length, preventing joint loosening in structural applications
• Precise thread engagement with Class 6g tolerance and M20x2.5mm coarse thread profile for quick assembly and secure fastening
• Enhanced torque transmission via external hex drive and 32mm head width, allowing for high tightening forces with standard tools
• Industry-standard compatibility meeting DIN 6914/ISO 7412 specifications, ensuring interchangeability and engineering consistency
• Environmental compliance with RoHS 3 and REACH regulations, making them suitable for regulated industrial applications

Professional Applications & Engineering Value

Engineered for heavy-duty structural connections, these M20 hex head screws solve critical fastening challenges in construction, machinery, and infrastructure projects. The hot-dipped galvanized steel construction provides superior protection against rust and corrosion in outdoor or chemically aggressive environments. With 150,000 psi tensile strength and Rockwell C32 hardness, these Class 10.9 metric bolts maintain integrity under extreme vibration and dynamic loads. The partially threaded design with 107mm grip length ensures maximum clamping force across unthreaded sections while the coarse 2.5mm pitch thread enables rapid installation in steel frameworks, heavy equipment assembly, and industrial machinery where DIN 6914/ISO 7412 compliance is required for structural safety.

Specification Summary & Compliance

These hex head screws feature precision Class 6g thread fit with M20x2.5mm metric coarse threads and 33mm thread length. Manufacturing conforms to DIN 6914 ISO 7412 specifications for dimensional accuracy and mechanical properties. The fasteners are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances above threshold limits. The external hex drive with 32mm head width and 12.5mm head height provides standardized tool engagement for consistent installation torque values.