S-91263A478 M8 x 60 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capability with Class 12.9 strength rating and 170,000 psi tensile strength for critical structural applications
• Superior corrosion resistance through zinc plating that protects against industrial environmental factors
• Precise installation and removal with 5mm hex drive that prevents stripping and ensures secure fastening
• Optimal material engagement with M8 coarse threading (1.25mm pitch) that resists vibration loosening
• Enhanced durability with Rockwell C39 hardness that maintains performance under repeated stress
• Flush mounting capability with standard flat head profile that creates smooth surface finishes
• Reliable thread quality with Class 5g6g fit that ensures consistent performance in mating components

Professional Applications & Engineering Value

These high-strength metric flat head screws deliver exceptional performance in demanding industrial environments where failure is not an option. The zinc-plated alloy steel construction provides crucial corrosion protection while maintaining the Class 12.9 strength rating required for heavy machinery, automotive assemblies, and structural frameworks. The M8 coarse threading with 1.25mm pitch offers superior resistance to vibration-induced loosening, making these hex drive screws ideal for equipment subject to dynamic loads. The partially threaded design concentrates strength where needed most, while the flat head configuration enables flush mounting in precision applications. Engineered to DIN 7991 standards, these fasteners provide reliable, consistent performance across manufacturing, construction, and industrial maintenance applications.

Specification Summary & Compliance

This metric fastener features precise M8 x 1.25mm coarse threading with Class 5g6g thread fit tolerance, ensuring compatibility with standard metric components. Manufactured to DIN 7991 specifications with comprehensive compliance including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The 60mm length with 22mm minimum thread length provides optimal engagement for various material thicknesses, while the 90° countersink angle ensures proper seating in standard applications.