S-92400A420 Length 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior thread forming in plastics with tri-lobe shank design that creates strong, permanent threads without pre-tapping
• Enhanced corrosion resistance through zinc plating, extending service life in various industrial environments
• High-torque installation capability with external hex head design for secure driving and reduced stripping risk
• Optimal material displacement with fully threaded blunt tip design that minimizes stress cracking in plastic components
• Reliable holding power with precise 1/4" diameter and 10 threads per inch configuration for consistent performance
• Broad compatibility with standard 3/8" wrench sizes for efficient installation across multiple applications
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

Our zinc-plated steel TRS tapping screws deliver exceptional engineering value in plastic assembly applications where traditional fastening methods often fail. The unique tri-lobe shank design revolutionizes thread forming by displacing plastic material efficiently, creating permanent threads that resist loosening under vibration and thermal cycling. This thread forming screw technology eliminates the need for separate tapping operations, significantly reducing assembly time and labor costs. The external hex drive provides superior torque transmission compared to Phillips or slotted drives, preventing cam-out during high-speed installation. Engineered specifically for plastic fastening applications, these screws minimize stress concentration that can lead to cracking in brittle polymers, ensuring long-term joint integrity in automotive components, electronic enclosures, and consumer products.

Specification Summary & Compliance

This precision 1/4" TRS tapping screw features a 3/8" hex head with 0.24" height and 1/2" overall length. The thread forming design operates with Class 2A thread tolerances and requires a 5.5 mm (0.2165") drill bit for proper installation in plastic materials. Manufactured to industry standards for thread forming screws, this fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The right-hand threaded, fully threaded configuration provides consistent performance in automated assembly processes.