S-91290A044 M18 x 70 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior hardness at Rockwell C37 provides excellent wear resistance and maintains thread integrity under repeated use.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in demanding industrial environments.
• Precision hex drive (14mm) allows for secure tool engagement and high torque application, minimizing stripping and improving installation efficiency.
• Class 12.9 strength rating guarantees consistent performance for heavy-duty mechanical assemblies, ensuring long-term joint security.
• Partially threaded design with 48mm thread length provides optimal grip and clamping force where full threading isn't required.
• Compliance with DIN 912/ISO 4762 standards ensures dimensional accuracy and interchangeability in global engineering applications.

Professional Applications & Engineering Value

This M18 socket head cap screw delivers critical engineering value through its black-oxide alloy steel construction and Class 12.9 strength class, specifically engineered to address vibration-induced loosening and high tensile stress in heavy machinery. The coarse metric thread (2.5mm pitch) facilitates quicker assembly in structural steel frameworks and industrial equipment while maintaining Class 5g6g thread fit for precise engagement. The standard socket head profile with 14mm hex drive enables flush mounting in confined spaces—ideal for CNC machining centers, automotive jigs, and hydraulic press fixtures where reliability under dynamic loads is paramount. These partially threaded fasteners prevent cross-threading in blind holes while providing concentrated clamping force at the joint interface.

Specification Summary & Compliance

Manufactured to DIN 912/ISO 4762 specifications with Class 5g6g thread tolerance ensuring precise dimensional consistency. The screw maintains 70mm overall length with 48mm minimum thread length and M18x2.5mm coarse threads. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.