S-93882A536 1/4"-20 x 1/2" 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 creates durable, secure threads in materials like steel and aluminum without pre-tapping.
• Flanged hex head provides a larger bearing surface for increased clamping force and prevents pull-through in sheet metal applications.
• External hex/slotted drive offers versatile installation options with standard tools, improving assembly efficiency.
• Coarse UNC threading ensures rapid installation and reliable holding power in a wide range of base materials.
• Full threading along the shank maximizes grip length and distributes load evenly for enhanced joint integrity.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and global market acceptability.

Professional Applications & Engineering Value

This 1/4-20 zinc-plated steel flanged tapping screw is engineered to address common fastening challenges in metalworking and assembly operations. Its thread forming (SW) design displaces material to create strong internal threads without generating chips, making it ideal for steel, aluminum, brass, cast iron, and sheet metal applications where debris contamination is a concern. The combination of external hex drive and flanged head provides excellent torque transmission and distributes clamping force over a wider area, reducing the risk of material deformation. The zinc plating offers a protective barrier against oxidation, ensuring long-term reliability in humid or corrosive environments. These features make it a preferred choice for automotive, machinery, and construction projects requiring robust, vibration-resistant connections.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with a 0.25" diameter and 1/2" length, manufactured to standard thread forming specifications. It is designed for use with a No. 2 drill bit (0.221" diameter) and is fully threaded for maximum engagement. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial components.