S-91263A510 6-40 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
- Exceptional tensile strength of 130,000 PSI ensures reliable performance under high-stress conditions, reducing failure risks in demanding applications.
- Class 3A thread fit provides superior precision and tight tolerances, minimizing backlash and ensuring secure fastening in critical assemblies.
- Zinc-plated alloy steel construction offers excellent corrosion resistance, extending service life in harsh industrial environments.
- Rockwell C39 hardness delivers enhanced durability and wear resistance, maintaining thread integrity through repeated use.
- Fully threaded design with 82° countersink angle allows for flush mounting and even load distribution, ideal for streamlined surfaces.
- 5/64" hex drive enables easy installation with standard tools, reducing assembly time and improving efficiency.
- Compliance with ASTM F835, RoHS 3, and REACH ensures adherence to rigorous quality and environmental standards, supporting sustainable procurement.
Professional Applications & Engineering Value
These 6-40 UNF fine thread flat head screws are engineered to address common industrial challenges such as vibration loosening and material fatigue. Made from zinc-plated alloy steel, they provide robust resistance against corrosion and mechanical stress, making them suitable for precision machinery, automotive assemblies, and electronic enclosures. The fine thread design enhances grip in thin materials, while the 82° countersink angle ensures a seamless fit, reducing protrusions and improving safety. With a hex drive for straightforward installation, these screws streamline maintenance and reduce downtime in high-performance engineering applications.
Specification Summary & Compliance
This product adheres to Class 3A thread fit for precise dimensional accuracy under the UNF thread standard. It meets ASTM F835 specifications for mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability in industrial use.
