S-90485A190 Length 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Excellent holding power in plastic materials due to the thread forming TRS design that creates strong, permanent threads without pre-tapping.
• Reduced installation torque and cam-out risk with the Phillips No. 1 drive, ensuring secure fastening and operator efficiency.
• Enhanced vibration resistance from the tri-lobe shank cross-section that prevents loosening under dynamic loads.
• Streamlined assembly process with fully threaded blunt tip design for easy starting and consistent performance in plastic applications.
• Compatibility with standard No. 44 drill bits and 82° countersinks for precise, flush mounting in various plastic components.
• Environmental and safety compliance meeting RoHS 3 and REACH regulations, ensuring safe use in industrial and consumer products.

Professional Applications & Engineering Value

These No. 4 x 3/4" tapping screws are specifically engineered for plastic assembly applications where reliability and material integrity are critical. The 18-8 stainless steel provides excellent resistance to oxidation and chemical exposure, while the thread forming TRS type with tri-lobe shank displaces plastic material to create strong, strip-resistant threads without requiring pre-threaded holes. This design eliminates the need for inserts in plastic components, reducing assembly time and part count. The Phillips flat head ensures a flush finish, ideal for aesthetic or aerodynamic surfaces in automotive, electronics, and consumer goods. With fully threaded construction and precise dimensional control, these screws deliver consistent clamp load and prevent material stress cracking, making them a trusted solution for high-volume manufacturing.

Specification Summary & Compliance

This TRS type tapping screw features a No. 4 size with 3/4" length, right-hand thread direction, and 20 threads per inch. Manufactured to standard inch dimensions with a flat head profile and Class 2A thread fit for reliable engagement. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial fasteners.