S-90854A178 M8 x 50 mm ISO 4017, DIN 933 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength and Class 10.9 rating for reliable performance in high-stress applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in demanding industrial environments
• Optimized thread engagement with M8 coarse pitch (1.25 mm) design for faster installation and reduced cross-threading risks
• Precise dimensional accuracy with Class 6h thread fit ensuring consistent performance and interchangeability
• Enhanced driving efficiency through external hex drive design that accommodates standard tools and prevents stripping
• Maximum grip length with fully threaded 50mm body for superior holding power across the entire fastener length
• Certified quality assurance meeting ISO 4017/DIN 933 specifications for guaranteed dimensional and mechanical properties

Professional Applications & Engineering Value

These high-strength metric hex head screws deliver critical engineering solutions for industrial applications where vibration resistance and structural integrity are paramount. The Class 10.9 steel construction with Rockwell C32 hardness provides exceptional fatigue resistance, making them ideal for heavy machinery, automotive assemblies, and structural frameworks. The zinc yellow-chromate plating creates a protective barrier against corrosion in harsh environments, while the coarse thread pitch ensures rapid installation and reliable performance in materials prone to vibration loosening. The fully threaded M8 design offers maximum clamping force distribution, solving common challenges of joint relaxation in dynamic load conditions. Engineered to ISO 4017/DIN 933 standards, these external hex drive fasteners provide the dimensional consistency and mechanical reliability demanded by precision industrial applications.

Specification Summary & Compliance

This M8 x 1.25 x 50mm hex head screw features precise Class 6h thread fit tolerances with right-hand coarse threading and complies with ISO 4017/DIN 933 specifications. The fastener maintains dimensional accuracy per international metric standards and meets mechanical requirements for Class 10.9 strength grade with verified 150,000 psi tensile strength and Rockwell C32 hardness. The zinc yellow-chromate plating provides corrosion protection while maintaining compliance with RoHS and REACH environmental regulations for industrial use.