S-93878A542 1/4"-20 x 1" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in harsh industrial environments.
• Effortless installation through thread forming design, reducing the need for pre-tapped holes and speeding up assembly in materials like steel and aluminum.
• Secure fastening with UNC coarse threads, providing excellent grip and vibration resistance in sheet metal and cast iron applications.
• Enhanced torque transmission from the Phillips No. 3 drive, minimizing cam-out and ensuring reliable tightening in high-stress conditions.
• Full threading for maximum hold across the entire 1" length, distributing load evenly and preventing loosening in dynamic applications.
• Broad material compatibility for use in steel, aluminum, brass, and cast iron, offering versatility across various industrial projects.
• Compliance with environmental standards including RoHS and REACH, ensuring safe and sustainable use in global supply chains.

Professional Applications & Engineering Value

These 1/4-20 zinc-plated steel tapping screws are engineered to address common challenges in industrial assembly, such as material fatigue and corrosion. The thread forming (SW type) design creates strong, precise threads in ductile materials like aluminum and brass, eliminating the risk of cross-threading and reducing installation time. With a pan head and Phillips No. 3 drive, they provide a low-profile, secure fit ideal for sheet metal and machinery components, while the coarse UNC thread ensures rapid engagement and high pull-out strength. This combination of zinc plating and robust steel delivers reliable performance in automotive, construction, and metalworking sectors, minimizing maintenance and downtime.

Specification Summary & Compliance

These screws feature a 1/4"-20 UNC coarse thread with standard Class 2A tolerances for consistent fit. They are fully threaded with a blunt tip and round shank, designed for use with drill bit size A (0.234" diameter). Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard reliability.