S-90434A115 Length 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior thread forming in plastic with TRS Tri-Lobe shank design that creates strong, reliable threads without pre-tapping
• Enhanced corrosion resistance through zinc-plated steel construction for extended service life in various environments
• Optimized drive engagement with No. 1 Phillips drive size providing secure torque transmission and reduced cam-out risk
• Flush mounting capability with standard flat head profile and 82° countersink angle for clean, professional finishes
• Full-length threading ensures maximum grip strength and uniform load distribution along the entire fastener length
• Precision compatibility with No. 37 drill bits (0.104" diameter) for accurate hole preparation and optimal performance
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global market acceptance

Professional Applications & Engineering Value

These No. 4 Phillips flat head TRS tapping screws are specifically engineered for plastic assembly applications where traditional fastening methods often fail. The thread forming Tri-Lobe shank design displaces material rather than cutting it, creating stronger threads with superior resistance to vibration loosening and pull-out forces. Made from zinc-plated steel, these screws provide excellent corrosion protection while maintaining the necessary strength for demanding plastic fastening scenarios. The standard flat head profile with 82° countersink angle ensures flush mounting in prepared holes, making them ideal for electronic enclosures, automotive trim components, and consumer products where aesthetic appearance matters. The combination of right-hand threading and 20 threads per inch delivers optimal engagement in various plastic materials from ABS to polycarbonate.

Specification Summary & Compliance

These thread forming screws feature precision Class 2A thread tolerances with a thread diameter of 0.112" and 20 threads per inch. The TRS (Thread Rolling Screw) design follows industry-standard thread forming specifications for plastic applications. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance. The screws are designed for use with No. 37 drill bits (0.104" diameter) to achieve proper hole preparation and optimal thread forming performance in plastic materials.