S-90434A199 Length 7/16" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic with tri-lobe shank design that displaces material to create durable, vibration-resistant threads
• Corrosion-resistant zinc-plated steel construction ensures long-term reliability in demanding industrial environments
• Efficient thread forming action eliminates chips and debris, preventing contamination in plastic assemblies
• Standard 82° countersink angle provides flush seating for clean, professional finishes
• Optimized Phillips No. 1 drive delivers secure tool engagement and reduced cam-out during installation
• Full threading along 7/16" length maximizes grip range and load distribution in plastic materials
• Compliance with RoHS 3 and REACH regulations meets international environmental standards for industrial use

Professional Applications & Engineering Value

These No. 4 TRS thread forming screws are specifically engineered to address common challenges in plastic assembly applications. The zinc-plated steel construction provides essential corrosion resistance while the tri-lobe shank cross-section creates strong, permanent threads in plastic substrates without generating chips that could compromise electrical components or moving parts. The 20 TPI thread pitch and thread forming tapping method ensure excellent pull-out resistance and vibration durability, making these Phillips drive flat head screws ideal for automotive trim, electronic enclosures, and consumer products where reliable fastening in plastic is critical. The combination of fully threaded design and standard 82° countersink allows for consistent seating and professional appearance across production runs.

Specification Summary & Compliance

These tapping screws feature precision TRS thread forming with 0.112" thread diameter and 20 approximate threads per inch. The flat head design incorporates a standard profile with 0.212" head diameter and 0.067" head height, compatible with No. 37 drill bit (0.104" diameter) for proper installation. Manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental responsibility while maintaining industrial-grade performance in plastic fastening applications.