S-91029A118 M12 x 35 mm ISO 4017, DIN 933 Extreme-Strength Metric Class12.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 170,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
• Maximum thread engagement with fully threaded design ensuring secure fastening across the entire length
• Precise torque application enabled by external hex drive and hex head design for easy installation with standard tools
• Optimized for industrial use with Class 12.9 strength grade and Rockwell C39 hardness for durability under heavy loads
• Reliable dimensional accuracy with Class 6h thread fit ensuring consistent performance and interchangeability
• International compliance assurance meeting ISO 4017/DIN 933 specifications for global project compatibility

Professional Applications & Engineering Value

This M12 hex head screw delivers critical engineering solutions where high tensile strength and corrosion resistance are paramount. The Class 12.9 steel construction, combined with Rockwell C39 hardness, provides exceptional resistance to vibration loosening and structural fatigue in heavy machinery, automotive assemblies, and construction equipment. The zinc yellow-chromate plating creates a protective barrier against oxidation and chemical exposure, significantly extending service life in demanding environments. The fully threaded metric coarse thread design (1.75mm pitch) ensures maximum grip strength and distributes clamping force evenly, while the external hex drive facilitates quick installation and removal with standard wrenching tools. These industrial fasteners are engineered to maintain integrity under extreme pressure, making them ideal for critical joints in manufacturing equipment, structural frameworks, and automotive subsystems where failure is not an option.

Specification Summary & Compliance

This metric hex head screw features precise M12 x 1.75mm coarse thread with Class 6h thread fit tolerance for consistent engagement. Manufactured to ISO 4017/DIN 933 specifications with a length of 35mm, head width of 19mm, and head height of 7.5mm. The fastener meets international standards for dimensional accuracy and mechanical properties, with full compliance to relevant industrial specifications for quality assurance in professional applications.