S-91253A667 7/16"-14 x 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 of 130,000 PSI for reliable performance in demanding applications and heavy-duty assemblies.
- Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
- Precise Class 3A thread fit ensures secure, vibration-resistant connections and reduces the risk of cross-threading during installation.
- High Rockwell C39 hardness offers excellent wear resistance and maintains thread integrity under high stress and repeated use.
- Convenient 1/4" hex drive allows for easy installation and removal with standard tools, improving assembly efficiency.
- Fully threaded coarse UNC design enables faster driving and stronger holding power in a wide range of materials.
- Compliance with major industry standards including ASME B18.3 and ASTM F835, guaranteeing consistent quality and interchangeability.
Professional Applications & Engineering Value
These 7/16"-14 UNC flat head hex drive screws are engineered to solve critical fastening challenges in industrial settings. The black-oxide alloy steel construction provides a durable barrier against rust and oxidation, making them ideal for machinery, automotive, and structural applications exposed to moisture or chemicals. The Class 3A thread fit and coarse thread spacing ensure rapid assembly with minimal risk of stripping, while the flat head design sits flush to prevent snagging and improve safety. With a tensile strength of 130,000 PSI, they reliably handle high vibrational loads and dynamic stresses, reducing maintenance needs and downtime in heavy-duty fastening systems.
Specification Summary & Compliance
This product features a 7/16"-14 UNC thread with Class 3A fit and coarse spacing, manufactured to ASME B18.3 and ASTM F835 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use. The screw is fully threaded, right-hand, and includes an 82° countersink angle for standard flat head applications.
