S-90434A112 Length 1" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic substrates thanks to the advanced thread-forming TRS design and tri-lobe shank that displaces material to create durable, high-strength threads.
• Corrosion-resistant performance is ensured by the zinc-plated steel construction, extending the screw's service life in various environments.
• Efficient and secure installation is achieved with the Phillips No. 2 drive and standard flat head, providing a flush finish and reducing the risk of cam-out during driving.
• Optimized for plastic assembly with a blunt tip and fully threaded body, preventing material cracking and ensuring consistent, reliable fastening along the entire length.
• Simplified pre-drilling process as it is designed for use with a standard No. 23 drill bit (0.154" diameter) and an 82° countersink angle for precise, clean hole preparation.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring the product is safe for use in regulated industries and global markets.

Professional Applications & Engineering Value

This No. 8 x 1" zinc-plated steel TRS tapping screw is engineered specifically for plastic fastening applications, where traditional screws may strip threads or cause material failure. Its thread-forming technology and unique tri-lobe shank cross-section compress the plastic, creating strong, permanent internal threads without the need for inserts. This design eliminates the risk of stress cracking common with thread-cutting types, providing a vibration-resistant hold ideal for plastic assembly in automotive trim, electronics enclosures, and consumer products. The combination of a Phillips flat head and precise 82° countersink ensures a clean, flush installation, while the zinc plating offers a protective barrier against corrosion, making these self-tapping screws for plastic a reliable, long-term fastening solution in demanding industrial environments.

Specification Summary & Compliance

This screw features a No. 8 size with a 0.164" thread diameter and 16 threads per inch in a right-hand thread direction. It is fully threaded with a blunt tip and conforms to standard inch system measurements for dimensional accuracy. The product is manufactured to meet industry standards for thread-forming tapping screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global supply chains.