S-91253A830 3/4"-16 x 1 1/2" 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 in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish extends service life in harsh industrial environments, minimizing maintenance needs.
- Precision Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in critical machinery.
- Fully threaded design offers maximum grip and load distribution along the entire length, enhancing joint integrity.
- 82° countersink angle allows for a flush, low-profile installation, ideal for applications requiring smooth surfaces.
- High hardness (Rockwell C37) resists wear and deformation, ensuring long-term durability under repetitive loads.
- 1/2" hex drive enables easy installation and removal with standard tools, speeding up assembly processes.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this black-oxide alloy steel flat head screw addresses common challenges like vibration loosening and corrosion in machinery, construction, and automotive sectors. The UNF fine thread and Class 3A fit deliver superior clamping force and resistance to dynamic stresses, while the fully threaded design ensures even stress distribution across joints. Its 82° countersink facilitates seamless integration into components requiring aerodynamic or aesthetic finishes. By combining high tensile strength with environmental compliance, it reduces downtime and maintenance costs in demanding environments.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precise UNF threading with fine spacing, ensuring dimensional accuracy per industry standards. It meets ASTM F835 specifications for mechanical properties and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental suitability for global industrial use.
