S-99461A206 Length 3/16" Tapping Screws

Key Features & Benefits at a Glance

• Corrosion-resistant 18-8 stainless steel construction ensures long-term reliability in humid or demanding environments
• Thread forming TRS design with tri-lobe shank creates strong, vibration-resistant threads in plastic without generating chips
• Phillips No. 1 drive system provides secure tool engagement and prevents cam-out during installation
• Fully threaded blunt tip design allows for easier starting and consistent thread engagement in plastic materials
• Optimized 20 threads per inch configuration delivers superior holding power in plastic applications
• Pan head with standard rounded profile offers low-profile fastening with excellent bearing surface
• Precision-matched to No. 37 drill bit (0.104") ensures proper hole sizing for reliable thread formation

Professional Applications & Engineering Value

This No. 4 TRS tapping screw is specifically engineered for plastic assembly applications where reliable fastening is critical. The thread forming technology with tri-lobe shank design displaces plastic material rather than cutting it, creating zero clearance fit that resists loosening from vibration. The 18-8 stainless steel material provides excellent corrosion resistance, making these Phillips drive screws ideal for outdoor equipment, electronic enclosures, and automotive plastic components. The fully threaded blunt tip ensures easy starting without damaging delicate plastic structures, while the 3/16" length provides optimal engagement for thin to medium plastic sections. These features combine to deliver vibration-resistant, durable fastening solutions that maintain integrity in thermal cycling and mechanical stress conditions common in plastic fastening applications.

Specification Summary & Compliance

This tapping screw features precision Class 2A thread tolerances with right-hand thread direction and 20 threads per inch configuration. The TRS (Thread Rolling Screw) design follows industry-standard thread forming specifications for plastic materials. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in various industrial and consumer applications. The screw is optimized for use with No. 37 drill bit (0.104" diameter) to achieve proper thread engagement in plastic substrates.