S-90605A129 M5 x 20 mm DIN 912, ISO 4762 Left-Hand Threaded Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI from Class 12.9 alloy steel for reliable performance in high-stress applications
• Superior corrosion resistance with black-oxide coating to extend service life in demanding industrial environments
• Precision left-hand threading (M5x0.8mm coarse) provides secure fastening in specialized mechanical assemblies requiring reverse threading
• Optimized torque transmission through 4mm hex drive socket head design for easy installation and removal without stripping
• Full thread coverage along the 20mm length ensures maximum grip and load distribution across connected components
• Certified hardness rating of Rockwell C37 guarantees consistent performance and resistance to deformation under heavy loads
• Global compliance assurance meeting DIN 912/ISO 4762 standards plus RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

This left-hand thread socket head cap screw solves critical engineering challenges in machinery requiring reverse-thread security, such as rotating equipment where standard right-hand threads might loosen from operational forces. The Class 12.9 alloy steel construction provides exceptional fatigue resistance for high-vibration environments, while the black-oxide surface treatment offers reliable corrosion protection without dimensional changes that could affect precision assemblies. The M5 coarse thread with Class 5g6g fit ensures rapid installation in industrial equipment maintenance, and the 4mm hex drive accommodates standard tools for efficient servicing. These metric socket head screws deliver dependable performance in automotive, manufacturing, and heavy equipment applications where failure prevention is paramount.

Specification Summary & Compliance

This socket head cap screw maintains precise Class 5g6g thread fit per ISO metric standards with M5x0.8mm coarse threading and 20mm fully threaded length. Manufacturing conforms to DIN 912/ISO 4762 specifications for dimensional accuracy and mechanical properties. The product is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety regulations for industrial components.