S-91310A957 M20 x 90 mm ISO 4014, DIN 931 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 10.9 strength rating and 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance and durability thanks to steel construction and Rockwell C32 hardness, ensuring long service life in demanding environments
• Optimized thread engagement with partial threading and M20x2.5 coarse thread design for faster installation and reduced risk of cross-threading
• Secure torque transmission through external hex drive and 30mm head width, allowing for high tightening forces with standard tools
• Precise dimensional consistency with Class 6g thread fit and ISO 4014/DIN 931 compliance, ensuring perfect interchangeability in metric assemblies
• Enhanced environmental compliance meeting RoHS 3 and REACH regulations for safe use in regulated industries
• Versatile 90mm length with 46mm minimum thread length providing flexible fastening solutions for various material thicknesses

Professional Applications & Engineering Value

This M20 hex head screw delivers critical engineering value through its Class 10.9 steel construction and metric coarse threading, specifically designed to address industrial fastening challenges. The partially threaded design concentrates strength where needed most, preventing thread damage in clearance holes while maintaining full shank integrity. With 150,000 psi tensile strength and Rockwell C32 hardness, it withstands extreme vibrational loads and dynamic stresses common in heavy machinery, structural steel connections, and industrial equipment assembly. The external hex drive and standardized dimensions ensure compatibility with common torque tools, streamlining installation in confined spaces while providing reliable clamp force retention. These characteristics make it ideal for construction, manufacturing, and automotive applications where failure prevention is paramount.

Specification Summary & Compliance

This hex head screw features precise Class 6g thread fit tolerance and M20x2.5 coarse thread specifications in accordance with ISO 4014 and DIN 931 manufacturing standards. The fastener maintains dimensional accuracy with 90mm total length and 46mm minimum thread length. Compliance is verified with RoHS 3 (2015/863/EU) for hazardous substance restriction and REACH (EC 1907/2006) for chemical safety, ensuring suitability for regulated industrial markets and international procurement requirements.