S-91253A025 10-32 x 5/16" 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 black-oxide coating for extended service life in demanding industrial environments
- Exceptional thread engagement with Class 3A fit ensuring precise, vibration-resistant connections in critical assemblies
- Maximum driving torque capability through hex drive design preventing cam-out and tool slippage during installation
- Optimal flush mounting with 82° countersink angle providing smooth surface finish and even load distribution
- High mechanical strength with 130,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
- Full threading design enabling maximum grip length and uniform stress distribution along the entire fastener
- Comprehensive compliance meeting ASTM F835 specifications and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
These 10-32 UNF flat head screws with Class 3A thread fit deliver precision performance in critical assembly applications where vibration resistance and dimensional accuracy are paramount. The black-oxide alloy steel construction provides excellent corrosion protection while maintaining the high tensile strength required for structural components, machinery, and precision equipment. The hex drive system ensures secure tool engagement during installation, preventing damage to fastener heads in high-torque applications. With fine threading and full thread coverage, these screws distribute clamping forces evenly, making them ideal for electronic enclosures, automotive assemblies, and industrial machinery where reliable, long-term fastening solutions are essential.
Specification Summary & Compliance
Manufactured to inch system dimensions with Class 3A thread tolerance for precision fit, these UNF fine thread screws comply with ASTM F835 specifications for mechanical properties and performance. The fasteners feature 82° countersink angle and are fully threaded for maximum engagement. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they meet international standards for restricted substances while delivering reliable performance in industrial applications.
