S-91253A679 7/16"-14 x 3" 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
- Superior corrosion resistance with black-oxide coating, ideal for harsh industrial environments
- Exceptional tensile strength of 130,000 psi ensures reliable performance under heavy loads
- Precision Class 3A thread fit provides secure, vibration-resistant fastening in critical applications
- 82° countersink angle enables flush mounting for clean, professional finishes
- Hex drive design with 1/4" drive size allows for easy installation and high torque application
- Partially threaded shank offers optimal grip strength while preventing material damage
- Rockwell C39 hardness delivers excellent wear resistance and long-term durability
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these black-oxide alloy steel flat head screws provide exceptional performance where corrosion resistance and structural integrity are paramount. The 7/16-14 UNC coarse thread configuration ensures rapid installation and superior holding power in metal fabrication, machinery assembly, and structural frameworks. The combination of 130,000 psi tensile strength and Rockwell C39 hardness makes these hex drive screws ideal for heavy-duty applications subject to vibration and dynamic loads. The 82° countersink angle and flat head design create seamless surface finishes while the partial threading prevents material stress concentration, making them perfect for precision engineering projects requiring both aesthetic appeal and mechanical reliability.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit and UNC coarse threading in the inch system. These flat head screws comply with ASTM F835 specifications for mechanical properties and dimensional accuracy. The products are fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, ensuring environmental responsibility and workplace safety. The black-oxide surface treatment provides consistent corrosion protection while maintaining the alloy steel's inherent strength characteristics.
