S-90434A181 Length 3/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black Oxide Steel coating, extending service life in demanding environments
• Exceptional holding power in plastic materials due to the Tri-Lobe shank design that creates secure, vibration-resistant threads
• Efficient, secure installation with the No. 2 Phillips drive, reducing cam-out and tool slippage
• Clean, flush finish with the standard 82° flat head profile, ideal for applications requiring a smooth surface
• Reliable thread forming action that displaces material without cutting, producing strong, strip-resistant threads in plastics
• Full-length threading for maximum grip and consistent fastening strength along the entire screw length
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for industrial use

Professional Applications & Engineering Value

These TRS thread forming screws are precision-engineered to solve common challenges in plastic assembly. The Black Oxide Steel construction provides a durable barrier against corrosion, crucial for components exposed to moisture or harsh conditions. The unique Tri-Lobe shank cross-section and thread forming (tapping) method work by displacing plastic material, which creates zero clearance threads with significantly higher pull-out strength and resistance to vibrational loosening compared to traditional thread-cutting screws. This makes them ideal for securing plastic housings, electronic enclosures, and automotive trim where material integrity and long-term reliability are paramount. The Phillips flat head design ensures a neat, countersunk finish when used with a standard 82° countersink angle, providing both aesthetic appeal and safety.

Specification Summary & Compliance

This No. 6 x 3/8" screw features a 0.138" thread diameter with approximately 19 threads per inch and is fully threaded. It is designed for use with a 1/8" (0.125") drill bit. Manufactured to precise dimensional standards for reliable performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting stringent industrial safety and environmental standards.