S-90117A626 3/8"-16 x 1 1/4" 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 in high-stress applications, reducing the risk of fastener failure.
• Precision Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in dynamic environments.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish for extended service life.
• Standard hex socket drive allows for easy installation with common tools, even in confined spaces, improving assembly efficiency.
• Coarse UNC threads enable quick assembly and disassembly, saving time in maintenance and repair operations.
• Fully threaded design ensures consistent clamping force along the entire length, providing uniform load distribution.
• Rockwell C37 hardness delivers excellent wear resistance, maintaining thread integrity through repeated use.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in heavy-duty industrial environments. The combination of 170,000 psi tensile strength and Class 3A thread fit ensures secure fastening in high-vibration machinery, automotive assemblies, and construction equipment, where reliability is paramount. The coarse UNC thread design facilitates rapid installation, reducing labor time in production lines, while the black-oxide surface treatment protects against rust and wear in harsh conditions. Ideal for applications requiring ASME B18.3 compliance, these screws provide a robust solution for precision engineering projects, from aerospace components to industrial automation systems, ensuring long-term performance without compromising on safety or efficiency.

Specification Summary & Compliance

This screw adheres to ASME B18.3 specifications, with precise Class 3A thread fit and UNC coarse threads for consistent performance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring compliance with global regulations for hazardous substance restrictions. Manufactured with exacting dimensional accuracy, including a 1 1/4" length and 5/16" hex drive, it guarantees reliable integration into industrial fastener systems.