S-90434A173 Length 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic materials with the Tri-Lobe shank design that displaces material to create durable, vibration-resistant threads.
• Corrosion-resistant zinc-plated steel construction ensures long-lasting performance in various industrial environments, reducing maintenance and replacement costs.
• Efficient installation with Phillips No. 3 drive allows for quick, secure fastening using standard tools, minimizing assembly time and labor.
• Clean, flush finish with 82° countersink angle provides a smooth surface profile ideal for applications where aesthetics and safety are priorities.
• Reliable thread forming action eliminates the need for pre-tapped holes, reducing assembly steps and potential material stress in plastic components.
• Full threading for consistent grip along the entire length ensures uniform load distribution and enhanced pull-out resistance in plastic assemblies.
• Compliance with RoHS 3 and REACH regulations guarantees safe, environmentally responsible use in global industrial supply chains.

Professional Applications & Engineering Value

These 1/4" TRS zinc-plated steel tapping screws are specifically engineered for plastic fastening applications, where traditional screws may strip or loosen under stress. The thread forming design and Tri-Lobe shank work together to compress and reform plastic material, creating strong, permanent threads without chips or debris. This is critical in industries like automotive trim, electronics enclosures, and consumer goods assembly, where vibration resistance and material integrity are paramount. The flat head with 82° countersink ensures a secure, flush fit, preventing snagging and improving product aesthetics. Made from zinc-plated steel, these screws offer excellent corrosion protection, extending service life in humid or demanding environments while maintaining RoHS and REACH compliance for safe, sustainable manufacturing.

Specification Summary & Compliance

This 1/4" TRS tapping screw features a right-hand thread with approximately 10 threads per inch and a blunt tip for controlled penetration in plastics. It is fully threaded for consistent performance and designed for use with a 0.234" drill bit (Size A). The screw complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components.