S-91290A184 M4 x 40 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with Class 12.9 alloy steel construction, providing reliable performance under high-stress conditions
• Superior corrosion resistance from the black-oxide coating, extending service life in harsh industrial environments
• Precise torque transmission through the 3 mm hex socket drive, reducing tool slippage and fastener damage
• Optimized thread engagement with M4 coarse (0.7 mm pitch) threads and Class 5g6g fit, ensuring secure fastening in various materials
• Versatile partial threading design allowing unthreaded shank sections for precise alignment and shear resistance
• Maximum load-bearing capacity with 170,000 psi tensile strength and Rockwell C37 hardness for heavy-duty applications
• Global compliance assurance meeting DIN 912/ISO 4762 standards plus RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

These Class 12.9 alloy steel socket head cap screws deliver critical engineering solutions where high tensile strength and corrosion resistance are paramount. The black-oxide surface treatment provides essential protection against rust and chemical exposure in manufacturing equipment, automotive assemblies, and machinery frames. The M4 coarse thread with precise Class 5g6g tolerance ensures rapid installation and vibration resistance, while the partially threaded design offers superior clamping force distribution. With 170,000 psi tensile strength, these metric hex socket screws prevent joint failure in high-vibration environments, making them ideal for heavy-duty industrial applications requiring DIN 912/ISO 4762 compliance and long-term reliability.

Specification Summary & Compliance

This socket head cap screw features M4 x 0.7 mm coarse threads with Class 5g6g thread fit tolerance, 40 mm overall length, and 20 mm minimum thread length. Manufactured to DIN 912/ISO 4762 specifications with right-hand threading and standard socket head profile. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.