S-90273A293 12-24 x 5/8" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional Strength: With 60,000 PSI tensile strength and Rockwell B70 hardness, these screws provide reliable, long-lasting fastening for demanding applications.
• Superior Corrosion Resistance: The zinc-plated steel construction offers excellent protection against rust and environmental degradation, extending service life.
• Optimized Drive Engagement: The Phillips No. 3 drive ensures efficient torque transfer and reduces the risk of cam-out during installation.
• Flush, Secure Fit: The standard flat head with an 82° countersink angle allows for a smooth, flush finish that minimizes snagging and improves safety.
• Reliable Thread Performance: Coarse UNC threads with Class 2A fit ensure easy starting, quick assembly, and consistent holding power in various materials.
• Full Thread Engagement: Fully threaded design maximizes grip strength and load distribution along the entire 5/8" length.
• Industry Compliance: Meets ASME B18.6.3 specifications and environmental regulations (RoHS 3, REACH), ensuring quality and safety for industrial use.

Professional Applications & Engineering Value

These 12-24 UNC flat head screws are engineered to address common industrial challenges, such as vibration loosening and material fatigue. Made from zinc-plated steel, they resist corrosion in harsh environments, making them ideal for machinery, automotive assemblies, and electrical enclosures. The coarse thread design and Class 2A thread fit provide excellent pull-out resistance in wood, plastic, and soft metals, while the Phillips No. 3 drive ensures quick, secure installation with standard tools. The 82° countersink angle and flat head profile allow for a seamless finish, reducing protrusions in applications where aerodynamics or safety are priorities. This combination of high tensile strength and precise engineering delivers dependable performance in repetitive or high-stress scenarios.

Specification Summary & Compliance

This product adheres to ASME B18.6.3 standards, ensuring dimensional accuracy and performance reliability. Thread specifications include 12-24 UNC coarse threads with a Class 2A fit for consistent engagement and ease of assembly. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free of hazardous substances and suitable for global industrial markets.