S-91280A042 M3 x 12 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 110,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Class 8.8 strength grade with Rockwell C21 hardness provides excellent durability and resistance to wear, extending the service life of your assemblies.
• Fully threaded M3 design with coarse 0.5mm pitch and Class 6g fit offers quick installation and secure, vibration-resistant connections in various materials.
• External hex head allows for easy tightening with standard tools, improving assembly efficiency and reducing labor time in industrial settings.
• Compliance with ISO 4017 (equivalent to DIN 933) ensures dimensional accuracy and interchangeability, guaranteeing consistent quality across global projects.
• RoHS 3 and REACH compliant construction supports environmental safety and regulatory adherence, making it suitable for use in sensitive or regulated industries.
• Black steel material provides corrosion resistance and a professional finish, enhancing both aesthetic appeal and longevity in harsh environments.

Professional Applications & Engineering Value

This M3 hex head screw is engineered to address common industrial fastening challenges, such as vibration loosening and material fatigue. Made from high-strength steel with a Class 8.8 rating, it delivers robust performance in machinery, automotive, and electronics assemblies where reliability is critical. The fully threaded metric design and coarse thread pitch ensure deep engagement and strong clamping force, minimizing the need for frequent maintenance. Its external hex drive simplifies installation in tight spaces, while compliance with ISO 4017 standards ensures precise fit and global interoperability. Ideal for applications requiring durable, RoHS and REACH compliant fasteners, this screw reduces downtime and enhances operational safety in demanding environments.

Specification Summary & Compliance

This product adheres to ISO 4017 (equivalent to DIN 933) for dimensional accuracy, with a Class 6g thread fit ensuring proper tolerance in metric applications. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free from hazardous substances. Manufactured to Class 8.8 strength grade with specified tensile strength and hardness, it is suitable for industrial use under standardized engineering requirements.