S-91251A461 12-24 x 7/8" ASTM A574 Alloy Steel 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 hardness (Rockwell C37) provides excellent wear resistance and durability, extending the service life of your assemblies.
• Precise Class 3A thread fit guarantees tight, secure fastening with minimal play, enhancing assembly accuracy and vibration resistance.
• Black-oxide coating on alloy steel offers effective corrosion resistance, protecting the screw in various industrial environments without compromising strength.
• Fully threaded design allows for maximum grip and adjustability along the entire length, simplifying installation in diverse mounting scenarios.
• Hex socket drive (5/32") enables easy installation with standard tools, reducing assembly time and improving efficiency in tight spaces.
• Compliance with ASTM A574, RoHS 3, and REACH ensures adherence to strict quality and environmental standards, providing peace of mind for regulated industries.

Professional Applications & Engineering Value

These socket head cap screws are engineered to address critical challenges in industrial settings, such as vibration loosening and material fatigue. The black-oxide alloy steel construction combines high tensile strength with corrosion resistance, making them ideal for heavy-duty machinery, automotive assemblies, and precision equipment where reliability is paramount. The UNC coarse threads and Class 3A fit ensure quick, secure fastening even in high-vibration environments, reducing maintenance needs. By meeting ASTM A574 specifications, these screws deliver consistent performance in applications requiring high-strength fasteners, from manufacturing jigs to aerospace components, ensuring long-term operational integrity.

Specification Summary & Compliance

This product features precise 12-24 UNC coarse threads with a Class 3A thread fit for superior dimensional accuracy. It is manufactured in accordance with ASTM A574 specifications, ensuring high-quality alloy steel material and performance standards. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety requirements for hazardous substances.