S-90434A117 Length 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior thread retention in plastics through TRS thread forming design that displaces material without chipping or cracking
• Eliminates need for pre-drilling with tri-lobe shank cross-section that creates secure mating threads while reducing installation torque
• Enhanced corrosion resistance provided by zinc-plated steel construction for extended service life in industrial environments
• Flush mounting capability with standard 82° countersink angle and flat head profile for smooth surface finishes
• Optimized drive engagement with Phillips No. 2 drive style preventing cam-out during high-torque installation
• Maximum thread engagement through fully threaded design along the entire 1/2" length for superior pull-out resistance
• Reliable industrial compliance meeting both RoHS 3 and REACH environmental regulations for safe manufacturing applications

Professional Applications & Engineering Value

These zinc-plated steel tapping screws are specifically engineered for plastic assembly applications where traditional fastening methods often cause stress cracking or insufficient holding power. The TRS thread forming technology with tri-lobe shank design creates precise mating threads in plastic substrates without generating chips, eliminating cleanup and ensuring consistent clamp load. The Phillips flat head configuration with 82° countersink provides flush mounting while the fully threaded No. 8 screw delivers maximum engagement depth. Ideal for electrical enclosures, automotive trim, and consumer product assemblies, these screws solve common plastic fastening challenges through controlled material displacement and superior anti-vibration performance.

Specification Summary & Compliance

This No. 8 x 1/2" tapping screw features a 0.164" thread diameter with 16 threads per inch in right-hand orientation. Manufactured to precise dimensional standards with Class 2A thread tolerances and standard flat head profile. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety in industrial applications. Compatible with No. 23 drill bit (0.154" diameter) for optimal pilot hole preparation in plastic materials.