S-90605A309 M10 x 40 mm DIN 912, ISO 4762 Left-Hand Threaded Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and reliability with Class 12.9 alloy steel construction, providing 170,000 psi tensile strength for demanding applications.
• Superior corrosion resistance thanks to the black-oxide coating, extending service life in harsh industrial environments.
• Secure and efficient installation with an 8mm hex drive and standard socket head, allowing for high torque application and reduced risk of stripping.
• Reliable left-hand thread engagement in coarse M10x1.5 pitch, designed for specific assemblies where reverse threading prevents loosening from counter-rotation.
• Optimized load distribution and precision fit with Class 5g6g thread tolerance and partially threaded design, minimizing stress concentration.
• Long-term durability under high stress supported by Rockwell C37 hardness, ensuring consistent performance in heavy-duty mechanical systems.
• Global compliance and safety assurance by meeting DIN 912/ISO 4762 standards and being RoHS 3 and REACH compliant for regulated industries.

Professional Applications & Engineering Value

This M10 socket head cap screw is engineered to address critical challenges in high-vibration and high-load environments. The left-hand thread design is essential for machinery where standard right-hand threads would naturally loosen due to rotational forces, providing a secure fastening solution in motors, presses, and rotating assemblies. Manufactured from Class 12.9 alloy steel with a black-oxide finish, it offers superior resistance to corrosion and wear, extending maintenance intervals. The coarse thread pitch ensures quick assembly and reliable holding power in soft materials or when frequent disassembly is required. Its partially threaded shank concentrates clamping force precisely where needed, reducing the risk of joint failure. Ideal for automotive, aerospace, and heavy equipment, this metric fastener delivers dependable performance where failure is not an option.

Specification Summary & Compliance

This screw features a Metric M10x1.5 coarse thread with Class 5g6g thread fit for precise dimensional accuracy. It is manufactured in accordance with DIN 912 / ISO 4762 standards, ensuring interchangeability and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industrial markets.