S-97349A432 Length 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in humid or demanding industrial environments.
• Excellent thread-forming capability using DST design for secure, vibration-resistant fastening in plastic materials without pre-tapped holes.
• Optimized drive efficiency with Phillips No. 2 drive, providing reliable torque transfer and reducing cam-out during installation.
• Enhanced material integrity through thread forming (not cutting), minimizing stress cracks and preserving the structural strength of plastic components.
• Full 1-1/2" threading for maximum grip length and pull-out resistance in deep or thick plastic assemblies.
• Broad regulatory compliance with RoHS 3 and REACH, making them safe for use in regulated industries and international markets.
• Precision-matched drilling with recommended No. 29 drill bit (0.136" diameter) for optimal thread engagement and installation ease.

Professional Applications & Engineering Value

These 18-8 stainless steel tapping screws are engineered specifically for plastic fastening applications, where material integrity and corrosion resistance are critical. The thread forming DST design creates strong, permanent threads in plastic substrates without generating chips, eliminating debris that could interfere with sensitive components in electronics or automotive assemblies. The Phillips pan head provides a low-profile, secure fit that resists loosening under vibration, while the blunt tip ensures precise alignment and reduces the risk of material splitting. Ideal for industrial equipment, consumer products, and outdoor enclosures, these screws deliver reliable performance in plastic-to-plastic or plastic-to-metal joints, maintaining clamp force even under thermal cycling and environmental exposure.

Specification Summary & Compliance

This No. 8-18 x 1-1/2" tapping screw features a 0.164" thread diameter with approximately 18 threads per inch in a right-hand direction, fully threaded for consistent holding power. Manufactured to standard inch dimensions with a pan head style (0.27" diameter, 0.097" height) and Phillips No. 2 drive. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they are free of restricted substances and safe for industrial use. Recommended for use with a No. 29 drill bit (0.136" diameter) for optimal performance in plastic materials.