S-91263A912 M8 x 12 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance with zinc-plated alloy steel construction extends service life in harsh environments, minimizing maintenance and replacement costs.
• High hardness rating (Rockwell C32) provides excellent wear resistance, maintaining thread integrity through repeated installations.
• Precise Class 6g thread fit guarantees smooth assembly and secure fastening, improving installation efficiency and joint reliability.
• Full threading design offers maximum grip length and uniform stress distribution, enhancing load-bearing capacity across the entire fastener.
• Standard 90° countersink angle enables flush mounting in prepared surfaces, creating clean, professional finishes without protrusions.
• 5mm hex drive system allows for high-torque installation with common tools, speeding up assembly while preventing stripping.

Professional Applications & Engineering Value

These M8 flat head screws deliver critical engineering solutions where high-strength fastening meets precision requirements. The zinc-plated alloy steel construction provides essential corrosion protection for machinery, automotive components, and structural assemblies exposed to demanding conditions. With Class 10.9 strength rating and fully threaded M8x1.25mm coarse threading, these fasteners maintain clamping force under vibration and dynamic loads, preventing joint loosening in industrial equipment. The flat head design with 90° countersink creates seamless surfaces in metal fabrication and precision engineering applications, while the hex drive enables efficient installation in confined spaces. Engineered to DIN 7991 specifications, these screws provide reliable performance in manufacturing, construction, and heavy equipment applications where fastener integrity is non-negotiable.

Specification Summary & Compliance

This metric flat head screw features M8x1.25mm coarse threading with Class 6g thread tolerance for precision fit. Manufactured from zinc-plated alloy steel with Class 10.9 strength rating, it delivers 120,000 psi tensile strength and Rockwell C32 hardness. The fastener is fully threaded with right-hand direction and standard 90° countersink angle. Compliance includes DIN 7991 specifications for dimensional accuracy, along with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for industrial applications requiring certified components.