S-91253A990 1 1/2"-6 x 5" 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 protecting the alloy steel core in demanding industrial environments
- Exceptional load-bearing capability from 130,000 psi tensile strength and Rockwell C37 hardness for heavy-duty applications
- Precision thread engagement with Class 3A fit ensuring reliable fastening and vibration resistance
- Optimized flush mounting through standard flat head profile with 82° countersink angle for seamless surface integration
- High-torque installation enabled by 1" hex drive that prevents stripping during assembly
- Full-thread engagement along the 5" length providing maximum grip strength in thick materials
- Regulatory compliance assurance meeting ASTM F835, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These black-oxide alloy steel flat head screws deliver critical performance where high tensile strength and corrosion resistance are paramount. The 1 1/2"-6 UNC coarse thread configuration ensures rapid installation in structural steel, heavy machinery, and construction applications where vibration resistance is essential. The Class 3A thread fit provides precise tolerances for secure fastening in high-stress environments, while the 82° countersink angle creates flush surfaces in metal fabrication and equipment assembly. The fully threaded design maximizes holding power through thick materials, making these industrial screws ideal for demanding applications where reliability cannot be compromised.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit standards with UNC coarse threading (1 1/2"-6) and right-hand thread direction. Complies with ASTM F835 specifications for mechanical properties and dimensional requirements. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features Rockwell C37 hardness and 130,000 psi tensile strength for superior mechanical performance in industrial fastening applications.
