S-90279A096 3-48 x 1/2" ASME B18.6.3 Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• High-strength performance with 60,000 psi tensile strength and Rockwell B69 hardness for reliable load-bearing capability
• Efficient installation using Phillips No. 1 drive, providing secure torque transfer and reducing assembly time
• Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fastening and vibration resistance
• Versatile rounded head design offering a low-profile finish suitable for various applications without snagging
• Full threading along the 1/2" length enables maximum grip and uniform stress distribution in assemblies
• Compliance with major standards including ASME B18.6.3, RoHS 3, and REACH for quality assurance and environmental safety

Professional Applications & Engineering Value

These 3-48 UNC zinc-plated steel rounded head screws deliver exceptional reliability in industrial and machinery applications where vibration loosening and corrosion are common concerns. The coarse thread design and Class 2A fit provide quick assembly with reduced cross-threading risks, while the fully threaded shank ensures consistent clamping force across the entire length. The zinc plating acts as a sacrificial layer, protecting the underlying steel from rust in humid or outdoor settings. With a Phillips No. 1 drive, these screws offer compatibility with standard tools, making them ideal for electronic enclosures, automotive components, and light mechanical assemblies that demand both strength and regulatory compliance.

Specification Summary & Compliance

This product adheres to Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. Manufacturing follows ASME B18.6.3 specifications for consistent quality. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances. Key dimensions include a 1/2" length, 0.187" head diameter, and coarse thread spacing for optimal performance in various substrates.