S-91290A855 M20 x 75 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 12.9 strength rating and 170,000 psi tensile strength for reliable performance in high-stress applications.
• Superior corrosion resistance provided by the black-oxide coating on alloy steel, extending service life in demanding industrial environments.
• Precise hex drive engagement with 17mm drive size and standard socket head profile for secure tooling and reduced cam-out risk.
• Optimized thread design with Class 5g6g fit and coarse 2.5mm pitch for faster assembly and reduced cross-threading in metric applications.
• Versatile partial threading with 52mm thread length on a 75mm screw allows for both clamping and alignment functions.
• Consistent dimensional accuracy ensured by compliance with DIN 912/ISO 4762 standards for reliable interchangeability.
• Environmental regulation compliance with RoHS 3 and REACH standards for safe use in regulated industries.

Professional Applications & Engineering Value

This M20 socket head cap screw delivers critical engineering value in heavy machinery, automotive assemblies, and industrial equipment where vibration resistance and structural integrity are paramount. The Class 12.9 alloy steel construction withstands extreme tensile loads while the black-oxide surface treatment provides essential protection against rust and chemical exposure in harsh operating conditions. The partially threaded design offers dual functionality: the unthreaded shoulder acts as a precision pilot for accurate component alignment, while the coarse metric thread enables rapid installation in high-volume production environments. Engineered to DIN 912/ISO 4762 specifications, this fastener solves common industrial challenges including joint failure, corrosion-induced degradation, and assembly inefficiency.

Specification Summary & Compliance

This socket head cap screw maintains Class 5g6g thread fit tolerance per metric standards, ensuring precise engagement in mating components. Manufacturing follows DIN 912 ISO 4762 dimensional requirements for head configuration, drive size, and thread geometry. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to international environmental and safety standards for industrial fasteners.