S-91205A724 1/2"-13 x 3" ASME B18.3, ASTM A574 Alloy Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
• Nylon patch thread locker provides vibration resistance and prevents loosening in temperatures from -70° to 250°F, enhancing operational safety.
• Black-oxide coating on alloy steel offers corrosion resistance and durability, extending service life in harsh industrial environments.
• Class 3A thread fit delivers precise, tight tolerances for superior engagement and load distribution in critical assemblies.
• 3/8" hex drive design allows for easy installation and high torque application with standard tools, improving assembly efficiency.
• Partially threaded shank enables secure clamping in specific zones without unnecessary threading, optimizing joint integrity.
• Compliance with ASME B18.3, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations, facilitating global procurement.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these socket head cap screws address common challenges like vibration-induced loosening and high-stress fatigue. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness, provides excellent wear resistance and structural integrity under dynamic loads. The UNC coarse thread and Class 3A fit ensure quick, reliable fastening in machinery, automotive, and construction sectors, where precision and durability are critical. The integrated nylon patch thread locker maintains clamp force in temperature-varying conditions, reducing maintenance needs and enhancing safety in assemblies exposed to thermal cycling or mechanical shocks.

Specification Summary & Compliance

This product features a 1/2"-13 UNC coarse thread with Class 3A precision for accurate fit and high load capacity. It is manufactured in accordance with ASME B18.3 specifications and ASTM A574 material standards, ensuring consistent quality. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety requirements for industrial use worldwide.