S-91290A078 M20 x 150 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength-to-weight ratio with Class 12.9 rating and 170,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance provided by black-oxide coating, extending service life in harsh industrial environments
• Precise torque transmission through 17mm hex drive socket head, ensuring secure fastening without stripping
• Optimized thread engagement with Class 5g6g thread fit and 52mm minimum thread length for consistent clamping force
• Enhanced durability from Rockwell C37 hardness, maintaining structural integrity under heavy loads
• Global compatibility with DIN 912/ISO 4762 standards, ensuring interchangeability across international projects
• Environmental compliance meeting RoHS 3 and REACH regulations for sustainable manufacturing practices

Professional Applications & Engineering Value

This M20 socket head cap screw delivers exceptional engineering value for heavy-duty industrial applications where reliability is paramount. The black-oxide alloy steel construction combined with Class 12.9 strength rating provides superior resistance to vibration loosening and fatigue failure in machinery, automotive assemblies, and structural frameworks. The partially threaded design with coarse 2.5mm pitch ensures rapid installation while maintaining precise alignment in high-stress joints. The 17mm hex drive socket head allows for high-torque applications without cam-out risks, making it ideal for confined spaces where wrench clearance is limited. These metric screws solve critical fastening challenges in manufacturing equipment, construction machinery, and transportation systems where high tensile strength and corrosion protection are essential for operational safety and longevity.

Specification Summary & Compliance

This socket head cap screw features precise Class 5g6g thread fit tolerance according to ISO metric standards, ensuring consistent engagement and load distribution. The manufacturing process strictly adheres to DIN 912/ISO 4762 specifications for dimensional accuracy and mechanical properties. The product maintains full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. The 150mm length with 52mm minimum thread length provides optimal unthreaded shank for shear applications while the right-hand coarse thread design follows international metric threading conventions for broad compatibility across industrial sectors.