S-91280A021 M8 x 70 mm ISO 8765, DIN 960 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional durability and load-bearing capacity with Class 8.8 strength grade and 110,000 psi tensile strength for reliable performance in demanding applications.
• Superior corrosion resistance provided by the zinc plating, extending the fastener's service life in harsh industrial environments.
• Precise and secure fastening ensured by the fine M8 x 1mm metric thread with Class 6h fit, minimizing the risk of loosening under vibration.
• Optimized for high-torque installation thanks to the external hex head design, allowing for easy and efficient driving with common tools.
• Versatile partial threading (minimum 22 mm) provides a strong grip where needed while allowing for unthreaded shank flexibility in specific assembly designs.
• Guaranteed material integrity with a Rockwell C21 hardness, ensuring the screw maintains its form and function without stripping or shearing.
• Compliance with international standards including ISO 8765 and environmental regulations (RoHS 3, REACH) for guaranteed quality and safety.

Professional Applications & Engineering Value

This M8 hex head screw is engineered to address critical challenges in industrial assembly and machinery. The Class 8.8 steel construction provides a robust solution for applications requiring high tensile strength and resistance to dynamic loads, preventing joint failure in heavy-duty equipment. The zinc plated finish offers a protective barrier against oxidation and chemical exposure, making it ideal for outdoor or corrosive environments. Its partially threaded design with a fine 1 mm pitch ensures precise engagement and clamping force, reducing stress concentration. Commonly used in automotive frames, construction machinery, and industrial conveyors, this metric screw delivers reliable performance, simplifying maintenance and enhancing the longevity of your engineered systems.

Specification Summary & Compliance

This fastener meets precise dimensional and performance criteria, including a Class 6h thread fit for accurate mating and a 70 mm length with a minimum 22 mm thread length. It conforms to ISO 8765 and is manufactured in accordance with strict quality controls. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances and safe for use in regulated industries.