S-91280A556 M8 x 60 mm ISO 4017, DIN 933, SAE J1199, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With a 110,000 psi tensile strength and Class 8.8 rating, this screw provides reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior Corrosion Resistance – The zinc plating offers enhanced protection against rust and environmental degradation, extending the service life of your assemblies.
• Optimized for Easy Installation – The external hex head and coarse 1.25mm thread pitch allow for quick, secure tightening with standard tools, saving time during assembly.
• High Durability and Hardness – Rockwell C21 hardness ensures the screw maintains its integrity under repeated loads and vibrations, ideal for demanding industrial environments.
• Full Threading for Maximum Grip – Fully threaded design ensures consistent holding power along the entire 60mm length, providing uniform clamping force.
• Wide Industry Compliance – Meets ISO 4017, DIN 933, and SAE J1199 standards, ensuring compatibility and reliability in global engineering projects.
• Environmental and Safety Compliance – RoHS 3 and REACH compliant, making it suitable for use in regulated industries without harmful substances.

Professional Applications & Engineering Value

This M8 hex head screw is engineered from Class 8.8 steel to address common industrial challenges such as joint loosening under vibration and corrosion in harsh environments. The zinc plating significantly enhances corrosion resistance, while the coarse thread with a 1.25mm pitch ensures rapid installation and secure fastening in materials like metal and heavy-duty plastics. Its fully threaded design and external hex drive provide excellent torque transmission and ease of use with standard wrenches, making it ideal for machinery, automotive, and construction applications where high tensile strength and durability are critical. By complying with ISO 4017 and DIN 933 standards, it guarantees precision and reliability, reducing maintenance needs and downtime in professional settings.

Specification Summary & Compliance

This fastener features a metric M8 x 1.25 thread with Class 6h thread fit for precise engagement, and is fully threaded with a right-hand direction. It adheres to manufacturing specifications including ISO 4017, DIN 933, and SAE J1199, ensuring dimensional accuracy and performance consistency. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms it is free from hazardous substances, meeting environmental and safety regulations for industrial use.