S-99461A219 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic materials thanks to the Tri-Lobe shank design that creates secure, vibration-resistant threads
• Excellent corrosion resistance provided by 18-8 Stainless Steel construction, ensuring long-term reliability in various environments
• Efficient and secure installation with the Phillips No. 3 drive and pan head, reducing cam-out and tool slippage
• Maximum thread engagement and grip from the fully threaded 1-1/4" length, ideal for thicker plastic assemblies
• Reliable thread forming action that eliminates the need for pre-tapped holes, reducing assembly time and cost
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe use in industrial applications
• Optimized for plastic applications with a blunt tip and specific drill bit size (No. 4 / 0.209") guidance for precise installation

Professional Applications & Engineering Value

This 1/4"-10 thread forming TRS tapping screw is engineered to address common challenges in plastic assembly, such as material cracking and stripped threads. The Tri-Lobe shank cross-section displaces plastic material during installation, creating strong, load-bearing threads that resist loosening under vibration and thermal cycling. Made from 18-8 Stainless Steel, it offers inherent corrosion resistance, making it suitable for applications exposed to moisture or harsh conditions, including outdoor equipment, automotive plastic components, and electronic enclosures. The Phillips drive style and pan head provide a balanced combination of driving torque and flush seating, while the thread forming design eliminates chips, ensuring clean, reliable fastening in thermoplastics and other plastic materials without pre-tapping.

Specification Summary & Compliance

This screw features a 1/4" thread diameter with 10 threads per inch and a fully threaded 1-1/4" length, adhering to standard inch system measurements. The thread forming (TRS) tapping method and Tri-Lobe shank are designed for optimal performance in plastics, with a recommended drill bit size of No. 4 (0.209" diameter) for proper hole preparation. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use.