S-90429A157 3/8"-16 x 6 1/2" 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 load-bearing capability with 130,000 psi tensile strength, ideal for high-stress industrial assemblies
- Enhanced wear resistance due to Rockwell C39 hardness, extending service life in demanding environments
- Precise Class 3A thread fit ensures reliable engagement and vibration resistance in critical applications
- Efficient installation with 7/32" hex drive and 82° countersink angle for flush, secure mounting
- Optimized for coarse UNC threading providing faster assembly and reduced cross-threading risks
- Partial threading design allows for focused clamping force on specific joint sections
- Full regulatory compliance with ASTM F835, RoHS 3, and REACH for safe, global industrial use
Professional Applications & Engineering Value
This 3/8"-16 UNC flat head screw delivers exceptional engineering value in heavy machinery, structural frameworks, and equipment manufacturing where high tensile strength and vibration resistance are critical. The alloy steel construction with Rockwell C39 hardness withstands dynamic loads and harsh operating conditions, while the partial threading and coarse UNC thread form enable rapid assembly without compromising joint integrity. The 82° countersink angle and hex drive facilitate precise, flush installations in countersunk holes, preventing protrusions in moving parts. These flat head screws solve common industrial challenges like loosening under stress and material fatigue, making them ideal for construction, automotive, and manufacturing applications requiring ASTM F835 compliant fasteners.
Specification Summary & Compliance
This fastener maintains Class 3A thread fit per UNC standards with 3/8"-16 coarse threading and partial threading up to 1 1/2" minimum. Manufacturing adheres to ASTM F835 specifications for dimensional consistency and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use in industrial markets.
