S-91290A080 M20 x 160 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with Class 12.9 alloy steel, ensuring reliable performance in high-stress applications and reducing the risk of fastener failure.
• Superior corrosion resistance provided by the black-oxide coating, extending the screw's service life in harsh industrial environments.
• High tensile strength of 170,000 psi and Rockwell C37 hardness for dependable load-bearing capacity and resistance to wear and deformation.
• Precise fit and easy installation thanks to the 17mm hex drive and standard socket head profile, allowing for efficient assembly with standard tools.
• Versatile coarse thread design (M20 x 2.5mm) with Class 5g6g thread fit, enabling quick engagement and secure fastening in various materials.
• Partially threaded shank for optimal grip and stress distribution, minimizing the risk of loosening under vibration or dynamic loads.
• Compliance with international standards including DIN 912/ISO 4762, RoHS 3, and REACH, ensuring quality, safety, and environmental responsibility for global projects.

Professional Applications & Engineering Value

This M20 socket head cap screw is engineered to address critical challenges in heavy-duty industrial applications, such as machinery assembly, automotive systems, and construction equipment. The Class 12.9 alloy steel construction delivers high tensile strength and hardness, making it ideal for environments subject to extreme forces and vibrations. The black-oxide surface treatment enhances corrosion resistance, prolonging fastener life in moist or chemically aggressive settings. With its coarse metric thread and precise Class 5g6g thread fit, it ensures rapid installation and reliable clamping force, reducing assembly time and maintenance needs. This screw's partially threaded design concentrates stress effectively, preventing joint failure and supporting long-term structural integrity in demanding engineering projects.

Specification Summary & Compliance

This product features a metric thread size of M20 with a 2.5mm pitch and Class 5g6g thread fit for precise dimensional accuracy. It adheres to DIN 912 and ISO 4762 standards for socket head cap screws, ensuring consistent quality and interchangeability. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms its environmental safety and suitability for use in regulated industries.