S-91251A615 1 1/4"-12 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 applications, reducing the risk of fastener failure.
• Durable black-oxide finish on alloy steel provides enhanced corrosion resistance, extending service life in harsh industrial environments.
• Precision UNRF fine thread with Class 2A fit offers superior vibration resistance and secure fastening in critical assemblies.
• 7/8" hex drive socket head allows for high-torque installation and easy access in confined spaces, improving assembly efficiency.
• Partially threaded design combines strong grip in the threaded section with smooth shank for precise clamping force distribution.
• Full compliance with ASTM A574 guarantees consistent quality and mechanical properties for engineering reliability.
• RoHS 3 and REACH compliant ensures environmental safety and regulatory acceptance for global industrial use.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address demanding industrial challenges where high tensile strength and corrosion resistance are critical. The 1 1/4"-12 UNRF fine thread provides excellent load distribution and vibration resistance, making it ideal for heavy machinery, structural frames, and precision equipment assemblies. The Rockwell C37 hardness and 170,000 PSI tensile strength ensure durability under dynamic loads, while the partially threaded configuration allows for optimal clamp load without thread damage. Commonly used in manufacturing, automotive, and construction sectors, this fastener delivers reliable performance in applications requiring robust, long-lasting connections.

Specification Summary & Compliance

This socket head cap screw features a 1 1/4"-12 UNRF fine thread with Class 2A thread fit for precise dimensional accuracy. It is manufactured in accordance with ASTM A574 specifications, ensuring consistent mechanical properties and quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial applications without hazardous substances.