S-90434A168 Length 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Exceptional holding power in plastic materials due to the TRS thread forming design that creates strong, permanent threads without chipping or cracking.
• Superior corrosion resistance provided by the zinc-plated steel construction, ensuring long-term durability in various environments.
• Reduced driving torque and minimized stress from the tri-lobe shank cross-section, allowing for easier installation and preventing material failure.
• Secure and reliable fastening with a fully threaded 20 TPI configuration, delivering maximum grip along the entire screw length.
• Widely compatible and easy to install using a standard Phillips No. 1 drive and a No. 37 drill bit for the pilot hole.
• Clean, flush finish achieved with the standard flat head and 82° countersink angle, ideal for applications where a smooth surface is required.
• Compliance with stringent environmental regulations, being RoHS 3 and REACH compliant for safe and responsible industrial use.

Professional Applications & Engineering Value

This No. 4 TRS thread forming screw is specifically engineered to address common challenges in plastic fastening, such as material stress, cracking, and poor thread retention. The zinc-plated steel provides excellent corrosion protection, while the tri-lobe shank design displaces material during installation, creating a zero-clearance fit that resists loosening from vibration. The fully threaded body and 20 TPI configuration ensure uniform stress distribution and superior pull-out strength in thermoplastics and other soft materials. Combined with the Phillips drive and specified No. 37 drill bit, it offers a reliable, efficient solution for assembly lines in automotive, electronics, and consumer goods manufacturing, reducing installation time and improving joint integrity.

Specification Summary & Compliance

This screw adheres to inch system measurements with a thread diameter of 0.112" and a length of 3/4". It features a standard flat head with an 82° countersink angle and a Phillips No. 1 drive. The thread forming (TRS) tapping method and fully threaded right-hand design are optimized for creating strong threads in plastic. The product is manufactured to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets current environmental and safety standards for industrial components.