S-97478A139 M20 x 80 mm DIN 6914, ISO 7412 Metric High-Strength Steel Heavy Hex Head Screws for Structural Applications

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance under extreme loads, reducing the risk of fastener failure in critical applications.
• Superior corrosion resistance from the hot-dipped galvanized steel coating extends service life and minimizes maintenance in harsh or outdoor environments.
• High-strength Class 10.9 rating provides excellent durability and fatigue resistance, ideal for heavy-duty structural and machinery assemblies.
• Coarse thread pitch (2.5mm) enables faster installation and reduced cross-threading risk, improving assembly efficiency on the production line.
• Partially threaded design with 49mm grip length ensures optimal clamping force distribution and prevents joint loosening under vibration.
• Precise Class 6g thread fit guarantees consistent engagement and alignment, facilitating smooth assembly with standard nuts.
• External hex drive and hex head allow for high-torque application using common tools, speeding up installation and removal processes.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these M20 hex head screws address critical challenges in structural steelwork, heavy machinery, and construction. The hot-dipped galvanized steel material provides a robust barrier against rust and chemical exposure, significantly extending fastener lifespan in corrosive environments like marine or chemical plants. With a Class 10.9 strength grade and 150,000 psi tensile strength, they withstand high dynamic loads and vibrations without compromising integrity. The partially threaded configuration and coarse metric thread design ensure secure clamping in thick materials, reducing the need for frequent retightening. Compliant with DIN 6914/ISO 7412 standards, these screws deliver reliable performance in bolted connections requiring precise external hex drive torque control.

Specification Summary & Compliance

This M20x2.5 hex head screw features a Class 6g thread fit per metric standards, ensuring dimensional accuracy and interchangeability. Manufacturing adheres to DIN 6914 and ISO 7412 specifications for heavy hex structural bolts. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for safe industrial use.