S-91180A542 M8 x 40 mm ISO 8765, DIN 960 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior Corrosion Resistance: Zinc plating provides excellent protection against rust and environmental degradation, extending service life in harsh industrial settings.
• High Tensile Strength for Demanding Applications: Class 8.8 strength grade and 110,000 psi tensile strength ensure reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Secure and Precise Fastening: Fine 1 mm thread pitch and Class 6h thread fit offer superior vibration resistance and precise engagement, minimizing loosening in dynamic applications.
• Optimized for Efficient Installation: External hex drive and hex head design allow for high-torque application with standard tools, speeding up assembly and maintenance processes.
• Enhanced Durability and Hardness: Rockwell C21 hardness provides excellent wear resistance, maintaining thread integrity and fastener performance over repeated use.
• Versatile Partial Threading: The partially threaded design provides an unthreaded shank for precise clamping and alignment, ideal for components requiring shear strength.
• Globally Recognized Quality and Compliance: Meets ISO 8765 (DIN 960) standards and is RoHS 3 & REACH compliant, ensuring material safety and international acceptance for B2B procurement.

Professional Applications & Engineering Value

This M8 metric hex head screw is engineered to address critical challenges in industrial assembly and machinery. The Class 8.8 steel construction, combined with a zinc plated finish, offers robust resistance to corrosion and mechanical stress, making it ideal for automotive, manufacturing, and construction applications where durability is paramount. The fine 1 mm pitch and Class 6h thread fit ensure tight, secure connections that resist vibration and loosening, reducing maintenance needs. Its partially threaded design provides a strong, unthreaded grip length for improved shear strength, while the external hex drive facilitates quick installation with common tools, enhancing productivity in high-volume B2B operations.

Specification Summary & Compliance

This fastener features a Class 6h thread fit per metric standards, ensuring precise dimensional accuracy and interchangeability. It complies with ISO 8765 (referencing DIN 960) for manufacturing consistency and is certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, adhering to environmental and safety regulations for industrial use.