S-91290A258 M5 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 rating and 170,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance provided by black-oxide coating on alloy steel, extending service life in harsh industrial environments
• Precise torque transmission through 4mm hex drive socket head design, preventing tool slippage and ensuring proper installation
• Optimized thread engagement with partially threaded M5 x 0.8mm coarse thread configuration for secure fastening and vibration resistance
• Industry-standard compatibility meeting DIN 912/ISO 4762 specifications, ensuring interchangeability and reliable performance
• Enhanced installation efficiency with standard socket head profile allowing easy access in confined spaces
• Environmental compliance assurance with RoHS 3 and REACH regulations, meeting international environmental standards

Professional Applications & Engineering Value

These high-strength socket head cap screws deliver exceptional engineering value in demanding industrial applications where reliability is critical. The black-oxide alloy steel construction provides superior corrosion protection while maintaining the mechanical properties needed for heavy-duty fastening. The M5 metric thread with coarse 0.8mm pitch ensures quick assembly and disassembly while providing excellent vibration resistance in machinery, automotive components, and industrial equipment. The partially threaded design with 22mm thread length concentrates strength where needed most, preventing thread damage during repeated installations. The socket head configuration with 4mm hex drive allows for high torque application in space-constrained environments, making these screws ideal for precision equipment, manufacturing fixtures, and structural assemblies requiring dependable, high-strength fastening solutions.

Specification Summary & Compliance

This socket head cap screw features precise M5 x 0.8mm coarse threading with Class 5g6g thread fit tolerance, ensuring consistent performance and interchangeability. Manufactured to DIN 912/ISO 4762 standards, the screw maintains dimensional accuracy and mechanical properties required for industrial applications. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, demonstrating commitment to sustainable manufacturing practices while delivering the high tensile strength (170,000 psi) and Rockwell C37 hardness expected from Class 12.9 fasteners.