S-91253A989 1 1/2"-6 x 4" 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 load-bearing capacity with 130,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance provided by black-oxide coating on alloy steel, extending service life in industrial environments
- Precision thread engagement with Class 3A fit ensures secure fastening and vibration resistance
- Optimal countersinking with 82° flat head profile for flush mounting and clean aesthetic finish
- Enhanced driving efficiency through 1" hex drive design, allowing high torque application without stripping
- Full threading along 4" length provides maximum grip strength and adjustment flexibility
- Regulatory compliance assurance meeting ASTM F835, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These 1 1/2"-6 UNC flat head screws deliver critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where vibration resistance and high tensile strength are paramount. The black-oxide alloy steel construction combined with Rockwell C37 hardness provides exceptional durability against wear and environmental exposure. The coarse thread spacing and Class 3A thread fit ensure rapid installation and reliable performance in high-vibration environments, while the 82° countersink angle creates seamless surface integration. These fully threaded fasteners are engineered to prevent loosening under dynamic loads, making them ideal for construction, manufacturing, and heavy equipment applications where failure is not an option.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 3A thread fit tolerance and UNC coarse thread specification. These screws conform to ASTM F835 manufacturing standards and demonstrate compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The right-hand thread direction and standardized flat head profile ensure compatibility with industrial fastening systems worldwide.
