S-91205A712 1/2"-13 x 1" ASME B18.3, ASTM A574 Alloy Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – Withstands up to 170,000 psi for reliable performance in high-stress industrial applications.
• Secure Vibration Resistance – Integrated nylon patch thread locker maintains tight fastening from -70° to 250°F, reducing loosening under dynamic loads.
• High Hardness & Durability – Rockwell C37 hardness ensures long service life and resistance to wear in demanding environments.
• Precision Thread Fit – Class 3A thread tolerance provides superior engagement and load distribution for critical assemblies.
• Corrosion-Resistant Finish – Black-oxide coating on alloy steel enhances protection against rust and extends fastener lifespan.
• Easy Installation with Standard Drive – 3/8" hex socket drive allows for efficient torque application using common tools.
• Full Thread Engagement – Fully threaded 1/2"-13 UNC coarse thread design offers consistent clamping force along the entire length.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial use, these Black-Oxide Alloy Steel socket head cap screws address critical challenges in machinery, automotive, and construction sectors. The combination of 170,000 psi tensile strength and Class 3A thread fit ensures reliable performance under high vibration and load conditions, minimizing failure risks. The nylon patch thread locker effectively secures joints across a wide temperature range (-70° to 250°F), making these fasteners ideal for equipment exposed to thermal cycling. With a coarse UNC thread and 3/8" hex drive, they enable quick assembly and disassembly, reducing downtime in maintenance-heavy applications while meeting stringent industry standards for safety and durability.

Specification Summary & Compliance

This socket head cap screw features a 1/2"-13 UNC coarse thread with Class 3A precision tolerance for accurate fit and optimal load-bearing capacity. Manufactured in compliance with ASME B18.3 and ASTM A574 specifications, it ensures consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial use.