S-91280A894 M20 x 120 mm ISO 4014, DIN 931, SAE J1199, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength with Class 8.8 rating (110,000 psi) ensures reliable performance in demanding applications, reducing the risk of fastener failure.
• Enhanced corrosion resistance from zinc plating prolongs service life, even in harsh industrial or outdoor environments.
• Robust Rockwell C21 hardness provides excellent wear resistance and maintains thread integrity during repeated installations.
• Coarse M20 x 2.5mm thread allows for faster assembly and better grip in softer materials, improving installation efficiency.
• Partially threaded design offers optimal clamping force distribution, minimizing stress concentration and enhancing joint stability.
• External hex drive and hex head enable easy installation with standard tools, reducing assembly time and labor costs.
• Compliance with ISO 4014, DIN 931, and SAE J1199 guarantees dimensional accuracy and interchangeability, ensuring seamless integration into global projects.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these M20 hex head screws address critical challenges in construction, machinery assembly, and structural frameworks. The Class 8.8 steel construction and Rockwell C21 hardness provide exceptional resistance to dynamic loads and vibration, preventing loosening in high-stress environments. With a coarse thread pitch of 2.5mm and partial threading, they deliver superior clamping force and reduce the risk of cross-threading, making them ideal for use in steel structures, automotive components, and industrial equipment. The zinc-plated finish adds a protective layer against moisture and chemicals, extending lifespan in corrosive settings while maintaining compliance with international standards for reliable, repeatable performance.

Specification Summary & Compliance

This metric hex head screw features precise M20 x 2.5mm coarse threads with a Class 6h thread fit and ISO 4014 dimensional standards, ensuring tight tolerances for secure fastening. Manufactured to meet ISO 898 mechanical properties and SAE J1199 specifications, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and usage in global markets.