S-91251A664 7/16"-14 x 1/2" 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.
• Superior corrosion resistance from the black-oxide coating extends service life in demanding industrial environments.
• Precise Class 3A thread fit provides consistent engagement and vibration resistance for secure assemblies.
• High Rockwell C37 hardness offers excellent wear resistance, maintaining integrity under repeated use.
• Fully threaded design allows for maximum adjustability and uniform clamping force along the entire length.
• 3/8" hex drive compatibility enables easy installation with standard tools, improving assembly efficiency.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global projects.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these black-oxide alloy steel socket head cap screws address critical challenges in machinery, automotive, and construction sectors. The UNRC coarse thread design facilitates quick assembly and resists loosening under vibration, while the fully threaded configuration ensures uniform stress distribution. With a tensile strength of 170,000 psi and Rockwell C37 hardness, they withstand extreme loads and abrasive conditions, reducing maintenance downtime. The black-oxide surface treatment provides a durable barrier against rust and corrosion, making them ideal for harsh environments where reliability is paramount. These fasteners deliver consistent performance in precision equipment, structural frames, and high-torque assemblies, supporting long-term operational safety and efficiency.

Specification Summary & Compliance

This socket head cap screw features a 7/16"-14 coarse thread with Class 3A fit for precise dimensional accuracy, adhering to UNRC standards. It is manufactured in compliance with ASTM A574 specifications, ensuring high-strength material integrity. The product is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental and safety regulations for use in various industrial markets.