S-90117A718 1/2"-13 x 1 3/4" ASME B18.3 Alloy Steel Wire-Lockable Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life and maintaining integrity in harsh industrial environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections with minimal play, enhancing assembly stability and safety.
• 3/8" hex drive design allows for high-torque installation using standard tools, facilitating efficient maintenance and reducing assembly time.
• Coarse UNC threading enables quick engagement and disassembly, ideal for applications requiring frequent adjustments or rapid assembly lines.
• Full threading along the 1 3/4" length offers versatile fastening depth options, accommodating various material thicknesses with consistent holding power.
• Compliance with ASME B18.3, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations, providing peace of mind for global supply chain integration.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, automotive systems, and construction equipment. The combination of alloy steel material and Rockwell C37 hardness delivers outstanding resistance to wear and deformation, while the 1/2"-13 UNC coarse threads with Class 3A fit provide superior clamping force and vibration resistance, preventing loosening in dynamic environments. The 3/8" hex drive ensures easy access in confined spaces, streamlining installation and reducing labor costs. Ideal for applications requiring high tensile strength and durability, this fastener supports efficient, reliable operations in sectors like manufacturing, aerospace, and energy infrastructure.

Specification Summary & Compliance

This socket head cap screw features precise 1/2"-13 UNC Class 3A threads with coarse spacing and right-hand direction, ensuring dimensional accuracy per ASME B18.3 specifications. The fully threaded design and inch system measurements (e.g., 1 3/4" length, 3/8" drive size) support consistent performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and suitability for international industrial markets.