S-91253A716 1/2"-13 x 1 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Precision Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in dynamic environments.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish for extended service life.
• 82° countersink angle and flat head design allows for a flush, secure fit, improving aesthetics and safety in assembled products.
• Fully threaded UNC coarse thread enables faster installation and strong holding power in a wide range of materials.
• 5/16" hex drive facilitates easy installation and removal with standard tools, boosting assembly efficiency.
• Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations, ensuring product safety and reliability.

Professional Applications & Engineering Value

Engineered for demanding environments, these 1/2"-13 UNC flat head screws are crafted from black-oxide alloy steel to combat corrosion and wear in industrial settings. The fully threaded coarse thread design ensures rapid, secure fastening in metal, wood, and composite assemblies, while the Class 3A thread fit minimizes backlash and enhances load distribution. Ideal for machinery, structural frameworks, and heavy equipment, these screws address common issues like vibration-induced loosening and material fatigue. Their high tensile strength and Rockwell C39 hardness provide durability under extreme conditions, making them a trusted choice for engineers seeking longevity and compliance in industrial fasteners.

Specification Summary & Compliance

This product features precise Class 3A thread fit per UNC standards, with a thread size of 1/2"-13 and coarse spacing for optimal performance. Dimensions include a length of 1-1/2", head diameter of 0.938", and 82° countersink angle. Manufactured to meet ASME B18.3 and ASTM F835 specifications, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry reliability.