S-91253A982 1"-14 x 3" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, ideal for harsh industrial environments and extending service life.
• Exceptional tensile strength of 130,000 psi ensures reliable performance under high-stress conditions, reducing failure risks.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant connections in critical assemblies.
• Fully threaded design allows for maximum grip and uniform load distribution along the entire 3" length.
• 5/8" hex drive facilitates easy installation and removal with standard tools, improving assembly efficiency.
• ASTM F835 compliance guarantees consistent quality and mechanical properties for demanding applications.
• RoHS 3 and REACH compliant meets environmental regulations, ensuring safe and sustainable usage.

Professional Applications & Engineering Value

This black-oxide alloy steel flat head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and high-load demands. The fine 1"-14 UNF thread and Class 3A fit deliver superior clamping force and resistance to dynamic stresses, making it ideal for machinery, automotive, and structural applications. The flat head with standard profile ensures a flush finish, while the hex drive allows for quick, tool-friendly installation. With a hardness of Rockwell C37 and robust alloy steel construction, it provides long-term reliability in heavy-duty settings, minimizing maintenance and replacement costs.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit for precise engagement and ASTM F835 specifications for mechanical integrity. It features a 1"-14 fine UNF thread, fully threaded 3" length, and 82° countersink angle. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it meets environmental and safety standards without compromising performance.