S-91263A127 3-48 x 3/8" 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 corrosion resistance with zinc-plated alloy steel construction, ideal for harsh industrial environments
- Superior load-bearing capability from 130,000 psi tensile strength and Rockwell C39 hardness for reliable performance
- Precise thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance
- Efficient installation using standard 1/16" hex drive for quick assembly with common tools
- Optimized flush mounting with 82° countersink angle and flat head design for smooth surface finishes
- Full-thread coverage along the 3/8" length provides maximum grip strength in various materials
- Regulatory compliance meeting ASTM F835, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These 3-48 UNC flat head screws deliver critical performance in demanding applications where material integrity and fastener reliability are paramount. The zinc-plated alloy steel construction provides essential corrosion protection for machinery, electronic enclosures, and automotive assemblies exposed to environmental stressors. With coarse UNC threads and Class 3A thread fit, these fasteners offer superior resistance to loosening under vibration while maintaining precise alignment in metal-to-metal and composite material joints. The combination of 130,000 psi tensile strength and fully threaded design ensures consistent clamping force distribution, making them ideal for high-stress points in manufacturing equipment, industrial controls, and precision instruments where fastener failure is not an option.
Specification Summary & Compliance
These flat head screws feature precision 3-48 UNC coarse threads with Class 3A thread fit for tight tolerance applications. Manufacturing specifications comply with ASTM F835 standards for consistent quality and performance. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they meet current environmental and safety requirements for industrial use worldwide.
