S-91253A379 1/2"-20 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
- Exceptional Tensile Strength – Withstands up to 130,000 psi, providing reliable performance in high-stress industrial environments.
- Superior Corrosion Resistance – Black-oxide coating on alloy steel enhances durability and longevity in harsh conditions.
- Precision Thread Fit – Class 3A thread ensures tight, secure connections with minimal risk of loosening or failure.
- Efficient Hex Drive Installation – 5/16" hex drive allows for quick, tool-friendly assembly and disassembly.
- Optimized Flat Head Design – 82° countersink angle and standard profile enable flush mounting for sleek, safe surfaces.
- Full Thread Engagement – Fully threaded UNF fine spacing maximizes grip and load distribution across applications.
- Industry Compliance Assurance – Meets ASME B18.3 and ASTM F835 standards, ensuring quality and reliability.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these Black-Oxide Alloy Steel Flat Head Screws address critical challenges like vibration resistance and material fatigue. The UNF fine thread spacing and Class 3A thread fit provide superior holding power in machinery, automotive assemblies, and structural frameworks, minimizing the risk of strip-out or loosening under dynamic loads. The 82° countersink angle ensures a seamless finish, reducing snag hazards and improving aesthetics in precision equipment. Ideal for heavy-duty fastening in manufacturing, construction, and aerospace, these screws deliver consistent performance where reliability and compliance with ASME B18.3 and ASTM F835 are paramount.
Specification Summary & Compliance
This screw features a 1/2"-20 UNF thread with Class 3A precision tolerance for exact fit and function. Manufactured to ASME B18.3 and ASTM F835 specifications, it guarantees dimensional accuracy and mechanical integrity. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety standards for global industrial use.
