S-90277A212 1/4"-20 x 1/2" ASME B18.6.3 Steel Binding Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Exceptional holding power with 60,000 psi tensile strength and Rockwell B69 hardness for reliable fastening performance
• Quick installation and removal through wide binding head design with slotted drive for easy tool access
• Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring secure connections in various materials
• Full-length threading provides maximum grip along the entire 1/2" shaft for superior load distribution
• Regulatory compliance assurance meeting ASME B18.6.3 standards while being RoHS 3 and REACH compliant
• Right-hand thread direction offers standard, intuitive fastening operation for efficient assembly processes

Professional Applications & Engineering Value

This zinc-plated steel rounded binding head screw delivers exceptional engineering value for industrial applications where vibration resistance and reliable fastening are critical. The combination of UNC coarse threading and Class 2A thread fit ensures optimal performance in metal, wood, and composite materials, reducing the risk of cross-threading during installation. The wide binding head profile with slotted drive provides excellent bearing surface distribution while allowing quick assembly with standard tools. Particularly valuable in electrical enclosures, machinery assembly, and equipment manufacturing, this fully threaded fastener maintains consistent 60,000 psi tensile strength throughout its length, preventing joint failure under dynamic loads and vibration. The zinc plating offers sacrificial corrosion protection, extending service life in industrial environments where moisture and chemicals are present.

Specification Summary & Compliance

This 1/4"-20 x 1/2" rounded head screw features precise Class 2A thread fit with UNC coarse threading (20 threads per inch) and full threading along the entire shaft. Manufactured to exacting ASME B18.6.3 specifications, the fastener ensures dimensional accuracy and performance reliability. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility and safe use in various industrial applications. The inch system measurement provides compatibility with North American equipment and standards.