S-91263A884 M5 x 40 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength and Class 10.9 rating for reliable performance in demanding applications.
• Superior corrosion resistance through zinc-plated alloy steel construction, extending service life in harsh environments.
• Precise thread engagement with Class 6g fit and coarse M5x0.8mm threading for secure fastening and vibration resistance.
• Optimized installation efficiency featuring hex drive design and standard flat head profile for easy countersinking and tool access.
• Enhanced durability with Rockwell C32 hardness and fully threaded shank for consistent strength across the entire fastener length.
• Regulatory compliance assurance meeting DIN 7991 specifications, RoHS 3, and REACH standards for global industrial use.
• Versatile metric sizing with 40mm length and 90° countersink angle for seamless integration in standardized assemblies.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Class 10.9 metric flat head screws deliver critical performance where high tensile strength and vibration resistance are paramount. The zinc-plated alloy steel construction provides essential corrosion protection in manufacturing equipment, machinery frames, and structural assemblies exposed to operational stresses. With fully threaded M5 coarse threading and Class 6g thread fit, these fasteners ensure secure engagement in both soft and hard materials, preventing loosening under dynamic loads. The hex drive design combined with the standard flat head profile enables flush mounting in countersunk holes, ideal for applications requiring smooth surface finishes and streamlined aerodynamics. These DIN 7991 compliant screws solve common engineering challenges of joint integrity, material compatibility, and long-term reliability in automotive, construction, and industrial machinery sectors.

Specification Summary & Compliance

This M5 x 0.8mm x 40mm flat head screw maintains precision Class 6g thread fit according to metric standards, with fully threaded coarse spacing for optimal performance. Manufacturing adheres to DIN 7991 specifications for dimensional accuracy and mechanical properties. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) for hazardous substance restriction and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance.