S-91263A445 M4 x 25 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and reliability with Class 12.9 rating and 170,000 psi tensile strength for demanding industrial applications
• Superior corrosion resistance provided by zinc-plated alloy steel construction, extending service life in harsh environments
• Optimized installation efficiency through 2.5mm hex drive design that prevents cam-out and ensures secure fastening
• Enhanced load distribution with flat head profile and 90° countersink angle for flush mounting in precision assemblies
• Reliable thread engagement with fully threaded M4x0.7mm coarse pitch design for faster installation and vibration resistance
• Precision manufacturing compliance meeting DIN 7991 standards with Class 5g6g thread fit for consistent quality
• Environmental regulation compliance with RoHS 3 and REACH standards for safe use across global markets

Professional Applications & Engineering Value

Engineered for high-performance industrial fastening, these M4 flat head screws solve critical challenges in machinery, equipment manufacturing, and structural assemblies. The zinc-plated alloy steel construction provides essential corrosion protection while maintaining Rockwell C39 hardness for wear resistance. The fully threaded design with 0.7mm coarse pitch ensures rapid installation and superior holding power in metal-to-metal applications. The flat head profile with 90° countersink creates seamless flush mounting in precision components, eliminating protrusions that could interfere with moving parts. These metric screws deliver exceptional tensile strength for heavy-load applications where fastener failure is not an option, making them ideal for automotive, industrial machinery, and critical infrastructure projects requiring DIN 7991 compliance.

Specification Summary & Compliance

This M4 x 25mm flat head hex screw features precision Class 5g6g thread fit according to metric standards, ensuring consistent threading performance. Manufacturing complies with DIN 7991 specifications for dimensional accuracy and quality control. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, confirming absence of restricted substances. With fully threaded construction and right-hand thread direction, these screws provide reliable fastening solutions for professional industrial applications requiring certified components.