S-91263A474 M8 x 18 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, preventing fastener failure.
• Superior hardness (Rockwell C39) provides excellent wear resistance and durability, extending the screw's service life.
• Zinc-plated alloy steel construction offers enhanced corrosion resistance, protecting the fastener in various industrial environments.
• Fully threaded M8 coarse thread design delivers maximum grip and holding power, ensuring a secure and stable connection.
• Precise Class 5g6g thread fit guarantees easy installation and consistent performance with standard metric nuts and tapped holes.
• Flat head with 90° countersink allows for a flush, clean finish when installed, ideal for applications where a protruding head is not acceptable.
• Compliance with DIN 7991, RoHS 3, and REACH ensures the screw meets rigorous international standards for quality and environmental safety.

Professional Applications & Engineering Value

This M8 flat head hex screw is engineered for demanding industrial applications where failure is not an option. The Class 12.9 high-strength alloy steel and 170,000 psi tensile strength directly address the need for reliability in heavy machinery, automotive assemblies, and structural frameworks, preventing joint loosening under extreme vibration and load. The coarse thread (1.25mm pitch) and fully threaded design provide superior pull-out resistance in brittle materials or where high clamping force is critical. The zinc plating offers a protective barrier against corrosion, making it suitable for use in environments exposed to moisture or chemicals. Its hex drive ensures high torque application without cam-out, facilitating efficient assembly in confined spaces. This combination of material strength, thread design, and protective finish delivers a robust metric fastener solution that enhances the integrity and longevity of your engineering projects.

Specification Summary & Compliance

This flat head screw features an M8 x 1.25mm coarse thread with a Class 5g6g thread fit per ISO metric standards, ensuring precise dimensional accuracy and compatibility. It is manufactured to conform to the DIN 7991 specification. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in various markets.