S-91263A564 1/4"-20 x 1 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
- Exceptional corrosion resistance with zinc plating that protects against rust and extends service life in harsh industrial environments
- Superior holding power from 130,000 PSI tensile strength and Rockwell C39 hardness ensures reliable performance under heavy loads
- Precise thread engagement with Class 3A fit and UNC coarse threads provides secure fastening and reduces cross-threading risks
- Efficient installation with 5/32" hex drive and standard flat head profile allows for quick assembly with common tools
- Optimal flush mounting thanks to the 82° countersink angle that creates a smooth surface finish
- Full-thread design maximizes grip length and distributes stress evenly across the entire fastener
- Regulatory compliance with ASTM F835, RoHS 3, and REACH ensures safety and environmental standards are met
Professional Applications & Engineering Value
These zinc-plated alloy steel flat head screws deliver critical engineering solutions where vibration resistance and structural integrity are paramount. The fully threaded UNC coarse thread configuration prevents loosening in high-stress applications while the 82° countersink angle ensures seamless integration in precision machinery and equipment. With 130,000 PSI tensile strength and Class 3A thread fit, these hex drive screws maintain clamping force in heavy-duty industrial assemblies, automotive components, and construction applications where reliable fastening is non-negotiable. The combination of corrosion-resistant zinc plating and high-strength alloy steel construction makes them ideal for environments demanding both durability and compliance with industry standards.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit for superior tolerance control. These 1/4"-20 UNC coarse thread screws comply with ASTM F835 specifications for mechanical properties and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility in industrial applications.
