S-96660A221 M4 x 20 mm ISO 7380-2 Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 10.9 strength rating and 100,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc-plated alloy steel construction, extending service life in harsh industrial environments
• Optimized installation efficiency with integrated flange and 2.5mm hex drive, eliminating the need for separate washers while providing secure anti-rotation
• Enhanced thread engagement through coarse M4 x 0.7mm threading and Class 6h fit, ensuring vibration resistance and consistent clamping force
• Reduced assembly time with fully threaded design and rounded button head profile that facilitates quick alignment and driving
• Long-term reliability supported by Rockwell C32 hardness, maintaining structural integrity under repeated stress cycles
• Global compliance assurance meeting ISO 7380-2 specifications and environmental regulations for international project requirements

Professional Applications & Engineering Value

This M4 rounded head screw delivers critical engineering solutions where vibration resistance, corrosion protection, and high tensile strength are paramount. The zinc-plated alloy steel construction provides essential defense against environmental degradation in outdoor equipment, automotive assemblies, and industrial machinery. The integrated flanged design eliminates washer requirements while distributing clamp load effectively, preventing surface damage in sheet metal and plastic components. With Class 10.9 strength rating and coarse threading, these metric fasteners maintain secure connections in high-vibration environments where fine threads might loosen. The 2.5mm hex drive and rounded button head profile enable efficient installation in confined spaces, making them ideal for production lines requiring rapid assembly of electronic enclosures, machinery guards, and structural frameworks.

Specification Summary & Compliance

This fastener maintains ISO 7380-2 dimensional specifications with M4 x 0.7mm coarse threads featuring Class 6h tolerance for precise fitment. The 20mm length and 9.4mm flange diameter provide consistent engagement across standard material thicknesses. Manufacturing complies with Class 10.9 strength requirements (100,000 psi tensile, Rockwell C32 hardness) and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental directives for hazardous substance restrictions.