S-90096A437 1/4"-20 x 3/4" 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
- Superior corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in harsh industrial environments.
- Enhanced grip and vibration resistance from serrated locking flange, preventing loosening under dynamic loads.
- Efficient installation with external hex drive, allowing for high-torque application using standard tools.
- Reliable thread cutting in tough materials like aluminum, brass, and cast iron, eliminating the need for pre-tapped holes.
- Optimized for coarse UNC threads (1/4"-20), providing quick assembly and strong holding power in sheet metal and other applications.
- Flanged design for increased bearing surface, distributing load evenly and reducing the risk of material damage.
- Full threading for consistent engagement, ensuring secure fastening across the entire 3/4" length.
Professional Applications & Engineering Value
This zinc-plated steel flanged tapping screw is engineered to address common challenges in metalworking and assembly, such as material fatigue and corrosion. The thread cutting design (Type F) allows it to form precise threads in aluminum, brass, cast iron, and sheet metal without pre-drilled threads, saving time and labor costs. The external hex drive and coarse UNC thread enable rapid installation with standard wrenches, while the serrated flange enhances stability in high-vibration settings like automotive or machinery assemblies. Its robust construction meets the demands of heavy-duty applications, providing reliable performance where durability and compliance are critical.
Specification Summary & Compliance
This screw adheres to ASME B18.6.3 specifications (referencing SAE J933) for dimensional accuracy and performance. It features a 1/4"-20 UNC coarse thread with full threading and is manufactured from zinc-plated steel for corrosion protection. Compliant with RoHS 3 (2015/863/EU) regulations, it ensures environmental safety and is designed for use with a No. 2 drill bit (0.221" diameter) in various metal substrates.
