S-90096A438 1/4"-20 x 1" ASME B18.6.3, SAE J933 Tapping Screws
Tapping Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Self-tapping efficiency - Thread-cutting design eliminates pre-tapping needs, reducing installation time and labor costs in aluminum, brass, cast iron, and sheet metal
- Enhanced corrosion resistance - Zinc-plated steel construction provides reliable protection against rust in demanding industrial environments
- Secure vibration-resistant locking - Serrated flange creates permanent locking action without requiring separate washers
- Maximum thread engagement - Fully threaded design ensures superior holding power across the entire 1" length
- High-torque installation capability - External hex drive head allows for powerful tightening with standard tools
- Industry-standard compatibility - UNC coarse thread pattern ensures reliable performance and easy replacement
- Optimized material penetration - Blunt tip design with No. 2 drill bit compatibility provides controlled thread formation
Professional Applications & Engineering Value
This heavy-duty flanged hex tapping screw delivers exceptional value in metal fabrication and assembly operations. The thread-cutting technology eliminates the need for separate tapping operations, significantly reducing installation time and production costs when working with aluminum, brass, cast iron, and sheet metal components. The zinc-plated steel construction provides essential corrosion protection for industrial environments, while the serrated locking flange prevents loosening under vibration - a critical advantage in machinery and equipment applications. The combination of UNC coarse threads and external hex drive ensures reliable performance with standard tools, making these tapping screws ideal for high-volume production environments requiring consistent, repeatable fastening solutions.
Specification Summary & Compliance
This 1/4"-20 flanged hex tapping screw features UNC coarse threads with standard Class 2A tolerance for reliable fitment. Manufactured to meet ASME B18.6.3 specifications (SAE J933) ensuring dimensional accuracy and performance consistency. The product is RoHS 3 (2015/863/EU) compliant for environmental safety. Critical dimensions include 1" length, 3/8" head width, 0.52" flange diameter, and compatibility with No. 2 drill bit (0.221" diameter) for proper hole preparation in various metal substrates.
