S-93401A611 1/4"-20 x 3/4" ASTM F835, MS24667-30 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with cadmium plating, extending service life in harsh industrial environments
• Exceptional tensile strength of 140,000 PSI ensures reliable performance under heavy loads and vibration
• Precision Class 3A thread fit provides secure, consistent engagement and reduces cross-threading risks
• Full threading design maximizes grip strength and distributes stress evenly across the entire fastener length
• Standard 82° countersink angle enables flush mounting for clean, professional finishes in assembled products
• Hex drive compatibility with 5/32" tools allows for high-torque installation and easy maintenance access
• Rockwell C39 hardness rating maintains thread integrity and prevents stripping during repeated use

Professional Applications & Engineering Value

These 1/4"-20 UNC flat head screws deliver critical performance advantages in demanding industrial applications where vibration resistance and structural integrity are paramount. The cadmium-plated alloy steel construction provides essential corrosion protection for machinery, automotive components, and outdoor equipment exposed to moisture and chemicals. The coarse thread spacing and Class 3A thread fit ensure rapid installation while maintaining precise tolerances in production environments. Engineered with a standard flat head profile and 82° countersink angle, these fasteners create seamless, flush surfaces in metal fabrication, aerospace assemblies, and heavy equipment manufacturing. The fully threaded design maximizes clamping force distribution, making them ideal for applications requiring uniform stress management across joined materials.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNC coarse thread specifications. These flat head screws comply with ASTM F835 MS24667-30 manufacturing requirements, ensuring consistent quality and dimensional accuracy. The fasteners feature a 5/32" hex drive configuration, 3/4" length, and right-hand thread direction for standardized installation. Material composition and plating meet industry standards for mechanical properties and environmental compliance in industrial fastener applications.