S-93882A540 1/4"-20 x 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments.
• High-strength thread forming design (SW Type) creates durable, vibration-resistant threads in materials like steel and aluminum without pre-tapping.
• Enhanced driving versatility and torque transmission through the combination of external hex and slotted drive styles.
• Increased load distribution and stability from the integrated flange, reducing the risk of surface damage and loosening.
• Reliable fastening in coarse UNC threading (1/4"-20) ensures quick installation and strong holding power in various base materials.
• Full threading along the 3/4" length provides maximum grip and uniform stress distribution for consistent performance.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use in global supply chains.

Professional Applications & Engineering Value

This zinc-plated steel hex flange tapping screw is engineered to address common challenges in metal assembly, such as strip-out and corrosion. The thread-forming (SW Type) UNC coarse thread displaces material to form strong, precise internal threads without chips, making it ideal for steel, aluminum, brass, cast iron, and sheet metal applications. The external hex/slotted drive accommodates both manual and powered tools, enhancing installation efficiency. Its flanged head increases bearing surface, distributing clamp load effectively to prevent joint failure in high-vibration settings like machinery, automotive, and structural frames. By combining durable materials with advanced thread forming technology, this screw reduces installation time and improves long-term reliability in industrial fastening systems.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with a thread diameter of 0.25" and full threading along the 3/4" length. It is designed as a thread-forming tapping screw (SW Type) for use with a No. 2 drill bit (0.221" diameter). Manufactured from zinc-plated steel with a hex flange head and external hex/slotted drive, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial suitability.