S-90434A134 Length 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic materials thanks to the TRS thread forming design and tri-lobe shank that displaces material to create strong, permanent threads without chips.
• Excellent corrosion resistance provided by the zinc-plated steel construction, ensuring long-term durability in various industrial environments.
• Efficient and secure installation with the No. 2 Phillips drive, offering good torque transfer and reducing the risk of cam-out during assembly.
• Clean, flush finish achieved with the standard flat head and 82° countersink angle, ideal for applications where a smooth surface is required.
• Reliable full-length threading ensures consistent grip along the entire 1-1/2" length, providing uniform clamping force in plastic assemblies.
• Simplified installation process as these self-tapping screws form their own threads in pre-drilled holes (recommended No. 23 drill bit), eliminating the need for separate tapping operations.
• Compliance with major environmental regulations including RoHS 3 and REACH, making them suitable for use in regulated industries and global supply chains.

Professional Applications & Engineering Value

These No. 8 x 1-1/2" zinc-plated steel TRS tapping screws are specifically engineered for plastic fastening applications where reliable, vibration-resistant connections are critical. The thread forming TRS design with tri-lobe shank cross-section creates strong, strip-resistant threads in plastic materials by compressing rather than cutting the material, significantly reducing the risk of stress cracking. This makes them ideal for plastic assembly in electronics enclosures, automotive components, and consumer products where material integrity is paramount. The combination of zinc-plated steel corrosion protection and the flat head with 82° countersink provides both environmental durability and a clean aesthetic finish. These Phillips drive screws offer excellent drive stability for high-volume production environments, ensuring consistent performance in automated assembly systems.

Specification Summary & Compliance

These inch-system screws feature a No. 8 screw size with 0.164" thread diameter and 16 threads per inch, providing standard thread engagement for plastic materials. The fully threaded design ensures maximum holding power along the entire 1-1/2" length. Manufactured to industry standards for tapping screws with right-hand threading and blunt tip configuration. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they meet current environmental and safety requirements for industrial use worldwide.