S-91251A684 7/16"-14 x 3 3/4" 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.
• Durable black-oxide finish on alloy steel provides enhanced corrosion resistance, extending service life in harsh industrial environments.
• Precise Class 3A thread fit offers superior engagement and vibration resistance, minimizing loosening and maintenance needs.
• 3/8" hex drive design allows for easy installation and removal with standard tools, improving assembly efficiency and reducing labor time.
• Partially threaded shank enables secure clamping without thread interference, ideal for precise positioning in machinery and equipment.
• Rockwell C37 hardness ensures high wear resistance and durability, maintaining integrity through repeated use and heavy loads.
• Compliance with RoHS 3 and REACH standards guarantees environmental safety and regulatory adherence for global supply chains.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in industrial settings, such as vibration-induced loosening and corrosion in high-stress assemblies. The 7/16"-14 UNC coarse threads and Class 3A fit provide excellent grip and stability, reducing the need for frequent retightening in machinery, automotive, and construction applications. The partially threaded rod design allows for precise unthreaded shank sections to bear loads without thread damage, while the 3/8" hex drive ensures quick, tool-friendly installation. With a 170,000 psi tensile strength and corrosion-resistant black-oxide surface, it delivers long-term reliability in environments exposed to moisture, chemicals, and heavy mechanical stress, making it a cost-effective solution for OEMs and maintenance teams.

Specification Summary & Compliance

This screw adheres to ASTM A574 specifications, with precise Class 3A thread fit and UNC coarse threads for consistent performance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental and safety standards are upheld. Dimensions include a 3 3/4" length, 7/16"-14 thread size, and 3/8" hex drive, manufactured in the inch system for broad compatibility in industrial applications.