S-91280A088 M8 x 45 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity with Class 8.8 steel providing 110,000 psi tensile strength for reliable performance in demanding applications
• Superior Corrosion Resistance through black steel finish, extending service life in various industrial environments
• Optimized Thread Engagement with M8 coarse thread (1.25mm pitch) ensuring quick installation and secure fastening in diverse materials
• Enhanced Torque Transmission via external hex drive design, allowing for high tightening forces without slippage
• Maximum Thread Coverage with fully threaded 45mm length, providing consistent clamping force along the entire fastener
• Precision Manufacturing meeting Class 6g thread fit tolerance, ensuring compatibility with standard metric nuts and components
• Industry-Standard Compliance with ISO 4017/DIN 933 specifications, guaranteeing interchangeability and reliability

Professional Applications & Engineering Value

These M8 hex head screws deliver critical engineering solutions for industrial assembly challenges where vibration resistance and structural integrity are paramount. The Class 8.8 steel construction with Rockwell C21 hardness provides optimal strength-to-weight ratio, preventing thread stripping and maintaining clamp load under dynamic stresses. The coarse thread design (M8 x 1.25mm) excels in softer materials and high-vibration environments, reducing the risk of loosening while facilitating faster installation. The fully threaded configuration ensures uniform stress distribution across the entire 45mm length, making these metric hex bolts ideal for construction, machinery assembly, and heavy equipment applications where consistent holding power is essential. The external hex drive accommodates standard tools for efficient maintenance and disassembly cycles.

Specification Summary & Compliance

This hex head screw features precision metric threading with M8 diameter, 1.25mm pitch, and Class 6g thread fit tolerance according to ISO metric standards. Manufacturing complies with ISO 4017 and DIN 933 specifications for dimensional accuracy and mechanical properties. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring safe use across regulated industries. The 45mm length provides standardized dimensions for reliable integration into existing metric fastener systems.