S-91263A392 5-40 x 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc plating that protects against rust and extends service life in harsh environments
- Exceptional tensile strength of 130,000 psi ensures reliable fastening under high-stress conditions without failure
- Precise Class 3A thread fit provides secure, vibration-resistant connections with minimal risk of loosening
- Fully threaded design allows for maximum grip and uniform load distribution along the entire length
- Standard 82° countersink angle enables flush mounting for a clean, professional finish in assembled products
- Hex drive compatibility with 5/64" drive size offers easy installation and removal with standard tools
- Compliance with major industry standards including ASTM F835, RoHS 3, and REACH ensures safety and regulatory acceptance
Professional Applications & Engineering Value
These 5-40 UNC flat head screws are engineered to address critical fastening challenges in demanding industrial applications. The zinc-plated alloy steel construction provides excellent corrosion resistance, making them ideal for machinery, electronics, and outdoor equipment where environmental exposure is a concern. The coarse UNC threads and Class 3A thread fit ensure quick assembly and reliable performance in high-vibration environments, reducing maintenance needs. With their fully threaded design and 82° countersink angle, they deliver secure, flush mounting in metal fabrication, automotive components, and precision assemblies. These industrial screws offer consistent performance where strength, durability, and regulatory compliance are paramount.
Specification Summary & Compliance
This 5-40 UNC flat head screw features precise Class 3A thread fit per UNC standards, ensuring tight tolerances for reliable fastening. Manufacturing follows ASTM F835 specifications for quality assurance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety requirements for industrial use.
