S-91253A284 12-24 x 1 1/4" 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 Tensile Strength – Withstands up to 130,000 psi for reliable performance in high-stress applications.
- Superior Corrosion Resistance – Black-oxide coating on alloy steel provides enhanced durability in harsh industrial environments.
- Precision Thread Fit – Class 3A thread ensures tight, secure fastening with minimal risk of loosening.
- Optimized Head Design – Standard flat head with 82° countersink angle allows for flush mounting and improved aesthetics.
- Full Thread Engagement – Fully threaded design maximizes holding power across the entire screw length.
- Easy Installation – Hex drive (1/8") enables quick, secure tightening with standard tools.
- Industry Compliance – Meets ASTM F835, RoHS 3, and REACH standards for quality and environmental safety.
Professional Applications & Engineering Value
These 12-24 UNC flat head screws are engineered to address critical challenges in industrial assembly, where vibration resistance, material integrity, and long-term reliability are paramount. The black-oxide alloy steel construction combats corrosion, extending service life in demanding settings like machinery, automotive, and structural frameworks. The Class 3A thread fit and coarse thread spacing ensure rapid installation and superior grip, reducing the risk of strip-out under dynamic loads. With a fully threaded profile and hex drive, these screws deliver consistent clamping force and ease of use, making them ideal for applications requiring flush mounting and high tensile strength without compromising on compliance or durability.
Specification Summary & Compliance
This screw adheres to UNC coarse thread standards with a precise Class 3A thread fit for optimal engagement. Dimensions include a 1-1/4" length, 12-24 thread size, and 82° countersink angle. It meets ASTM F835 specifications for mechanical properties, alongside full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material quality.
