S-91253A831 3/4"-16 x 1 3/4" 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
- Enhanced corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
- Superior load-bearing capacity from 130,000 psi tensile strength, ensuring reliable performance under high stress.
- Precise thread engagement with Class 3A fit, minimizing the risk of cross-threading and improving assembly reliability.
- Optimized flush mounting with 82° countersink angle and flat head design, providing a smooth surface finish.
- High torque application capability via 1/2" hex drive, enabling secure fastening with standard tools.
- Full threading for maximum grip, distributing clamp force evenly along the entire 1 3/4" length.
- Compliance with ASTM F835, RoHS 3, and REACH, meeting rigorous industrial and environmental standards.
Professional Applications & Engineering Value
This 3/4"-16 UNF flat head hex screw is engineered for heavy-duty applications where precision and durability are critical. The black-oxide alloy steel construction offers excellent resistance to rust and wear, making it ideal for machinery, automotive assemblies, and structural frameworks exposed to harsh conditions. With a Rockwell C37 hardness and 130,000 psi tensile strength, it withstands extreme mechanical loads without failure. The Class 3A thread fit ensures tight tolerances, reducing vibration-induced loosening in dynamic systems. Its fully threaded design and 82° countersink angle facilitate seamless integration into countersunk holes, providing a secure, low-profile fastening solution that meets ASTM F835 specifications for industrial reliability.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit per UNF standards, ensuring precise dimensional accuracy. It is manufactured in accordance with ASTM F835 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial use without hazardous substances.
