S-91263A151 10-24 x 2" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating for extended service life in demanding industrial environments
• Exceptional tensile strength of 130,000 psi ensures reliable performance under heavy loads and vibration
• Precision Class 3A thread fit provides secure, consistent engagement and reduces cross-threading risks
• Optimized 82° countersink angle delivers flush seating for cleaner finishes and improved aerodynamics
• Rockwell C39 hardness maintains thread integrity and drive features through repeated installation cycles
• Hex drive compatibility allows for high-torque installation with standard industrial tools
• Partial threading design concentrates clamping force where needed most for joint stability

Professional Applications & Engineering Value

These 10-24 UNC flat head screws deliver critical engineering solutions where surface flushness and high strength are paramount. The zinc-plated alloy steel construction provides essential corrosion protection for machinery, automotive assemblies, and outdoor equipment, while the coarse UNC thread ensures rapid installation in production environments. The partial threading design prevents thread damage in through-holes and concentrates clamping force precisely where needed. With their 82° countersink angle and hex drive compatibility, these fasteners solve common assembly challenges in metal fabrication, electrical enclosures, and structural components where vibration resistance and clean aesthetics matter.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread fit tolerances with UNC coarse thread profile and 2" length specification. These screws conform to ASME B18.3 and ASTM F835 manufacturing standards, ensuring dimensional consistency and performance reliability. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use across global industrial markets.