S-90096A546 1/4"-20 x 1 1/2" ASME B18.6.3, SAE J933 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 cutting action for Type F screws creates precise, durable threads in materials like aluminum and cast iron without pre-tapping.
• Flanged hex head design provides a larger bearing surface for increased clamping force and eliminates the need for a separate washer.
• External hex/slotted drive offers versatile installation options, accommodating both wrenches and screwdrivers for efficient assembly.
• Coarse UNC 1/4"-20 thread ensures rapid installation and superior holding power in a wide range of base materials.
• Full threading along the 1 1/2" length maximizes grip and load distribution across the entire fastened joint.
• Compliance with ASME B18.6.3 and RoHS 3 guarantees consistent quality, dimensional accuracy, and environmental safety for professional use.

Professional Applications & Engineering Value

This zinc-plated steel tapping screw is engineered to solve critical fastening challenges in sheet metal, aluminum, brass, and cast iron assemblies. Its Type F thread cutting design and coarse UNC thread form strong, reliable threads directly into the base material, eliminating the time and cost associated with pre-tapped holes. The integrated flange distributes clamping pressure over a wider area, reducing the risk of material distortion in thin-gauge applications. The external hex drive allows for high-torque installation, making it ideal for high-volume production lines and maintenance operations where speed and reliability are paramount. This screw delivers consistent performance in electrical enclosures, machinery frames, and automotive components, providing a durable, vibration-resistant connection.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with a Class 2A fit for standard applications, ensuring reliable engagement. It is fully threaded with a blunt tip and is designed for use with a No. 2 drill bit (0.221" diameter). Manufactured in compliance with ASME B18.6.3 dimensional standards and is RoHS 3 (2015/863/EU) Compliant, confirming its adherence to strict quality and environmental regulations for industrial use.