S-99397A737 Length 16 mm Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transmission with Torx Plus IP20 drive that prevents camout and reduces tool wear
• Excellent corrosion resistance through zinc-plated steel construction for extended service life in demanding environments
• Strong thread-forming capability with TRS tri-lobe shank design that creates permanent, vibration-resistant threads in plastic materials
• Maximum holding power with fully threaded M4.55 design and 1.59mm pitch for secure fastening in plastic applications
• Easy installation alignment with standard pan head profile and blunt tip for precise positioning without material damage
• Industry-standard compatibility with No. 23 drill bit (0.154") for streamlined installation processes
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for global industrial applications

Professional Applications & Engineering Value

These M4.55 thread forming screws are specifically engineered for plastic fastening applications where traditional fasteners fail. The TRS thread forming technology with tri-lobe shank cross-section displaces plastic material during installation, creating strong, permanent threads without tapping operations. This eliminates the need for separate inserts while providing superior vibration resistance critical in automotive, electronics, and appliance assemblies. The Torx Plus IP20 drive system ensures maximum torque transfer with minimal slippage, protecting both the fastener and installation tools. Made from zinc-plated steel, these screws offer reliable performance in environments where moisture and corrosion could compromise fastener integrity, making them ideal for outdoor equipment, electrical enclosures, and industrial machinery components requiring durable plastic connections.

Specification Summary & Compliance

This M4.55 x 16mm TRS tapping screw features a fully threaded design with approximate 1.59mm pitch and right-hand threading. The screw utilizes thread forming (not thread cutting) technology with tri-lobe shank cross-section for plastic applications. Manufactured to precise dimensional standards with standard pan head profile, 8mm head diameter, and 3.1mm head height. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. Compatible with No. 23 drill bit (0.154" diameter) for proper hole preparation in plastic materials.