S-91310A533 M8 x 20 mm ISO 4017, DIN 933 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capability with 150,000 PSI tensile strength for reliable performance in high-stress environments
• Exceptional durability thanks to Rockwell C32 hardness, resisting wear and deformation under heavy use
• Optimal thread engagement with fully threaded M8 coarse pitch design for faster assembly and stronger holding power
• Precise fit and compatibility ensured by Class 6g thread fit, reducing the risk of cross-threading and misalignment
• Robust corrosion resistance from high-grade steel construction, extending service life in harsh conditions
• Easy installation and removal with external hex drive and standard 13mm head width, compatible with common tools
• Global regulatory compliance meeting RoHS 3 and REACH standards for safe, environmentally responsible usage

Professional Applications & Engineering Value

This M8 hex head screw delivers critical reliability in demanding industrial applications such as machinery assembly, structural frameworks, and heavy equipment. The Class 10.9 strength grade and fully threaded coarse pitch design provide exceptional vibration resistance and clamp load retention, addressing common failure points in dynamic loads. Manufactured from high-strength steel and compliant with ISO 4017 DIN 933, it ensures dimensional consistency and interchangeability. The external hex drive allows for high-torque installation, making it ideal for automated or manual fastening processes where precision and repeatability are paramount.

Specification Summary & Compliance

This metric screw features M8 x 1.25 mm coarse threads with Class 6g tolerance for precise fit. It complies with ISO 4017 DIN 933 manufacturing standards, ensuring consistent quality and performance. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial use without hazardous substances.