S-90605A257 M8 x 35 mm DIN 912, ISO 4762 Left-Hand Threaded Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional durability with Class 12.9 strength rating and 170,000 PSI tensile strength for reliable performance in high-stress environments
• Superior corrosion resistance through black-oxide coating that protects against rust and extends service life in harsh conditions
• Precise left-hand thread engagement with M8x1.25mm coarse thread design for secure fastening in specialized applications requiring reverse threading
• Optimal torque transmission via 6mm hex drive socket head that prevents stripping and ensures consistent installation force
• Enhanced installation efficiency with partially threaded design providing both gripping power and clearance where needed
• Industry-standard compatibility meeting DIN 912/ISO 4762 specifications for seamless integration with existing metric fastener systems
• Environmental compliance assurance with RoHS 3 and REACH compliance for safe use in regulated industrial settings

Professional Applications & Engineering Value

This Class 12.9 alloy steel socket head cap screw delivers critical engineering solutions for demanding industrial applications where reverse threading is essential. The left-hand metric thread (M8x1.25mm) provides secure fastening in rotating equipment where standard right-hand threads might loosen under counter-rotational forces. The black-oxide surface treatment offers superior corrosion protection without compromising dimensional accuracy, making it ideal for machinery, automotive systems, and precision equipment operating in challenging environments. With its partially threaded configuration and 6mm hex drive, installation becomes more efficient while maintaining the high clamp force required for critical joints. The combination of Rockwell C37 hardness and precise Class 5g6g thread fit ensures reliable performance in vibration-prone applications, reducing maintenance frequency and downtime in production settings.

Specification Summary & Compliance

This metric socket head cap screw features M8x1.25mm coarse left-hand threads with Class 5g6g thread fit tolerance, ensuring precise engagement and consistent performance. The 35mm length with 28mm minimum thread length provides optimal fastening capability in various material thicknesses. Manufactured to DIN 912/ISO 4762 standards with Class 12.9 strength rating, this fastener maintains dimensional accuracy and mechanical properties throughout its service life. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and safety requirements for industrial components.