S-91253A814 5/8"-11 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
- Exceptional tensile strength of 130,000 psi ensures reliable performance under heavy loads, reducing the risk of fastener failure in demanding applications.
- Precise Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in high-stress environments.
- Black-oxide finish on alloy steel offers enhanced corrosion resistance, extending the screw's service life in various industrial conditions.
- Rockwell C37 hardness rating delivers excellent wear resistance and durability, maintaining structural integrity over repeated use.
- 82° countersink angle with standard flat head profile allows for a flush, secure fit, improving aesthetics and safety in assembled products.
- Partially threaded design with coarse UNC spacing enables faster installation and strong holding power in wood and metal applications.
- 3/8" hex drive facilitates easy installation and removal with standard tools, reducing assembly time and labor costs.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial and construction applications, these 5/8"-11 UNC flat head screws address critical challenges in structural assembly and machinery. The black-oxide alloy steel construction combats rust and wear, while the Class 3A thread fit ensures tight, reliable fastening that resists vibration-induced loosening—common in equipment subjected to dynamic loads. The partially threaded shank and coarse thread spacing provide rapid installation and robust grip in materials like steel frameworks and timber, reducing assembly time without compromising strength. Ideal for use in construction joints, industrial machinery, and automotive components, these screws deliver consistent performance where high tensile strength and durability are non-negotiable.
Specification Summary & Compliance
This product adheres to inch system measurements with a 5/8"-11 UNC coarse thread and Class 3A thread fit for precise dimensional accuracy. It meets ASTM F835 specifications for mechanical properties and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity in industrial use.
