S-91251A964 1 1/2"-6 x 10" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Black-oxide coating on alloy steel provides superior corrosion resistance and durability, extending service life in harsh environments.
• Coarse UNRC thread design with Class 2A fit allows for quick assembly and secure fastening, minimizing installation time and improving efficiency.
• Partially threaded shank offers precise clamping control, ideal for applications where unthreaded grip length is critical for joint integrity.
• Rockwell C37 hardness delivers excellent wear resistance, maintaining thread integrity and drive performance through repeated use.
• 1" hex drive socket head enables high-torque installation with standard tools, ensuring tight fastening without stripping.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting global industrial standards.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address common challenges in heavy machinery, construction, and automotive assembly, where vibration resistance and high clamp load are critical. The coarse 1 1/2"-6 UNRC thread ensures rapid installation and reliable holding power in soft or coarse materials, reducing the risk of cross-threading. With a partially threaded design, it provides optimal stress distribution, preventing loosening under dynamic loads. The black-oxide surface treatment enhances corrosion protection, making it suitable for outdoor or humid environments. Ideal for securing structural components, this screw combines high tensile strength and industrial-grade durability to minimize maintenance and downtime in demanding applications.

Specification Summary & Compliance

This socket head cap screw features precise Class 2A thread fit and coarse UNRC thread type for consistent performance. It adheres to ASTM A574 specifications for alloy steel socket head cap screws, ensuring material integrity and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries without hazardous substances.