S-91306A663 M4 x 20 mm ISO 7380 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength with Class 10.9 rating (140,000 PSI) ensures reliable performance in high-stress industrial applications
• Superior corrosion resistance through zinc-plated alloy steel construction extends service life in demanding environments
• Precise Class 6g thread fit guarantees smooth installation and secure fastening with consistent engagement
• Optimized hex drive design (2.5mm) provides excellent torque transmission and reduces tool slippage during assembly
• Full threading capability along the entire 20mm length offers maximum adjustment flexibility and holding power
• Rounded button head profile creates a finished appearance while minimizing protrusion in assembled applications
• Rockwell C32 hardness maintains structural integrity under repeated loading and vibration conditions

Professional Applications & Engineering Value

These M4 metric screws with Class 10.9 strength rating deliver critical reliability for industrial machinery, automotive assemblies, and heavy equipment where vibration resistance and structural integrity are paramount. The zinc-plated alloy steel construction provides essential corrosion protection in manufacturing environments, while the coarse thread pitch (0.7mm) enables rapid installation and superior resistance to loosening under dynamic loads. The fully threaded design ensures maximum thread engagement across the entire 20mm length, distributing stress evenly and preventing premature failure. Engineered to ISO 7380 standards, these hex drive screws with rounded head profile solve common fastening challenges in maintenance, repair, and production operations where durability and compliance are non-negotiable.

Specification Summary & Compliance

This M4 x 0.7mm x 20mm fastener features Class 6g thread tolerance for precision fit and coarse thread spacing optimized for industrial applications. Manufactured to ISO 7380 specifications with complete RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental responsibility and regulatory adherence. The right-hand thread direction and metric thread type provide global compatibility, while the 2.5mm hex drive and 7.6mm head diameter deliver standardized installation across industrial tooling systems.