S-91253A847 3/4"-10 x 3" 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 under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in harsh industrial environments and minimizing maintenance needs.
• Precise Class 3A thread fit guarantees tight, secure connections with excellent vibration resistance, enhancing assembly integrity and safety.
• Full threading along the 3" length offers maximum grip and holding power, allowing for versatile use in various material thicknesses without compromising strength.
• Easy installation and removal with the 1/2" hex drive, enabling efficient torque application and reducing assembly time in high-volume operations.
• Standard 82° countersink angle ensures a flush fit in prepared surfaces, providing a smooth finish and improved aesthetic for professional applications.
• Compliance with ASTM F835 and environmental standards assures consistent quality and eco-friendly use, meeting rigorous industrial and regulatory requirements.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial use, these 3/4"-10 UNC Class 3A flat head screws address common challenges in machinery, construction, and automotive assemblies. The black-oxide alloy steel construction combats corrosion and wear, while the coarse thread design enhances grip in softer materials or high-vibration settings. With a Rockwell C37 hardness and fully threaded shank, they deliver consistent clamping force and resist loosening, ideal for critical joints in structural frameworks or equipment mounts. The 1/2" hex drive simplifies installation in tight spaces, boosting productivity without sacrificing the 130,000 psi tensile strength needed for long-term reliability in demanding environments.

Specification Summary & Compliance

This fastener adheres to UNC coarse thread standards with a Class 3A thread fit for precise dimensional accuracy and tight tolerances. It meets ASTM F835 specifications for mechanical properties and is certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring it is free from hazardous substances and suitable for global industrial use. The 82° countersink angle and right-hand thread direction align with common assembly requirements, providing consistent performance across applications.