S-91290A089 M20 x 240 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with Class 12.9 rating and 170,000 PSI tensile strength, ensuring reliable performance under high-stress conditions.
• Superior corrosion resistance thanks to the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• Precise and secure fastening with M20 coarse thread (2.5mm pitch) and Class 5g6g thread fit, providing excellent grip and vibration resistance.
• Easy installation and removal using a standard 17mm hex drive, allowing for efficient assembly and maintenance with common tools.
• Optimized load distribution from the partially threaded design (52mm thread length), reducing stress concentration and enhancing joint integrity.
• Compliance with international standards including DIN 912 and ISO 4762, ensuring interchangeability and quality assurance for global applications.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting regulatory requirements for safe and sustainable use.

Professional Applications & Engineering Value

This M20 socket head cap screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, automotive systems, and structural frameworks. The black-oxide alloy steel construction provides enhanced corrosion resistance, reducing maintenance needs in humid or chemically aggressive environments. With a Class 12.9 strength rating and Rockwell C37 hardness, it withstands extreme tensile and shear forces, preventing fastener failure in high-vibration applications. The coarse thread design (2.5mm pitch) ensures quick installation and reliable holding power, while the partially threaded shank minimizes thread damage and improves alignment in pre-tapped holes. Ideal for metric coarse thread requirements, this screw delivers consistent performance in demanding sectors like manufacturing, construction, and energy infrastructure.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including Class 5g6g thread fit for metric applications, and conforms to DIN 912 / ISO 4762 standards for socket head cap screws. It meets regulatory requirements such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental and safety compliance. The specifications cover a length of 240mm, 52mm minimum thread length, and 17mm hex drive size, providing reliable interoperability in professional fastener systems.