S-90385A332 Length 3/4" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Excellent thread-forming capability in plastic materials without requiring pre-tapped holes, reducing assembly time and costs
• Optimized drive engagement with Phillips No. 1 drive style providing secure torque transmission and reduced cam-out risk
• Full-length threading ensures maximum grip strength and uniform stress distribution along the entire fastener length
• Precision-engineered pan head design offers low-profile installation with adequate bearing surface for secure fastening
• Industry-standard compliance with ASME B18.6.3 specifications guarantees consistent quality and dimensional accuracy
• Right-hand threading with 20 TPI provides reliable, vibration-resistant connections in plastic assemblies

Professional Applications & Engineering Value

These zinc-plated steel tapping screws deliver exceptional performance in plastic assembly applications where traditional fastening methods often fail. The DST-type thread forming design creates strong, permanent threads in plastic materials without generating chips or debris that could compromise electronic components or sensitive mechanisms. The fully threaded configuration ensures maximum pull-out resistance while the blunt tip prevents material splitting during installation. Particularly valuable in industrial construction and manufacturing settings, these Phillips drive screws provide reliable fastening in thermoplastic components, electrical enclosures, and automotive plastic assemblies where vibration resistance and long-term durability are critical. The combination of 0.125" thread diameter and 3/4" length makes them ideal for medium-duty plastic joining applications requiring consistent clamping force.

Specification Summary & Compliance

This tapping screw features precision inch system measurements with 0.125" thread diameter and 3/4" length, manufactured to exacting ASME B18.6.3 specifications for dimensional consistency and performance reliability. The thread forming design (DST type) creates mating threads in plastic materials without tapping operations. The fastener incorporates standard right-hand threading with 20 threads per inch and is compatible with No. 39 drill bit (0.0995" diameter) for proper hole preparation. Manufactured from zinc-plated steel for corrosion protection, these screws meet industry standards for mechanical properties and dimensional tolerances suitable for professional plastic fastening applications.