S-91306A717 1/4"-20 x 3" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated alloy steel construction, ideal for harsh industrial environments
• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress applications
• Precise Class 3A thread fit provides secure, vibration-resistant connections with minimal risk of loosening
• Fully threaded UNC coarse design allows for faster installation and stronger holding power in various materials
• Convenient 5/32" hex drive enables quick, high-torque assembly with standard tools
• Rounded button head profile offers a low-profile, aesthetically pleasing finish while reducing snagging risks
• Full compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH guarantees quality, safety, and environmental standards

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these zinc-plated alloy steel screws deliver exceptional durability where standard fasteners fail. The fully threaded UNC coarse spacing ensures maximum grip in metal, wood, and composite assemblies, while the Class 3A thread fit eliminates play in high-vibration machinery. With 120,000 psi tensile strength and Rockwell C39 hardness, they withstand extreme mechanical loads without stripping or shearing. The rounded head with hex drive simplifies maintenance in tight spaces, making them ideal for heavy-duty fastening in automotive, construction, and equipment manufacturing where reliability is non-negotiable.

Specification Summary & Compliance

This 1/4-20 x 3" screw maintains precise Class 3A thread fit per UNC standards with coarse spacing for optimal engagement. Manufactured to ASME B18.3 and ASTM F835 specifications, it ensures dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial use without hazardous substances.