S-99461A956 Length 18 mm Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-lasting performance in demanding environments.
• Efficient thread forming design creates strong, reliable threads in plastic materials without pre-tapping, reducing assembly time and costs.
• Secure Phillips drive engagement with No. 1 drive size provides consistent torque transmission and minimizes cam-out during installation.
• Optimized pan head profile offers a low-profile, rounded finish that sits flush while distributing clamping force evenly.
• Full 18mm threading delivers maximum grip length and pull-out resistance in plastic assemblies.
• Precision M3.5 metric sizing with consistent 1.57mm pitch ensures reliable compatibility with standard plastic components.
• Environmental compliance ready meeting RoHS 3 and REACH standards for safe use in regulated industrial applications.

Professional Applications & Engineering Value

These M3.5 tapping screws are specifically engineered for plastic applications where traditional fastening methods often fail. The 18-8 stainless steel construction provides excellent corrosion resistance while the TRS type thread forming design creates permanent, high-strength threads in plastic substrates without causing stress cracking. The Phillips pan head configuration ensures secure drive engagement and a clean aesthetic finish. Ideal for industrial fasteners in electronics enclosures, automotive trim, and consumer products, these screws eliminate the need for inserts while providing superior holding power in thermoplastics and other plastic materials. The combination of metric precision and specialized thread forming action makes them essential for assembly lines requiring reliability and repeatability.

Specification Summary & Compliance

This M3.5 x 18mm tapping screw features full threading with approximate 1.57mm thread pitch and blunt tip design for controlled penetration. Manufactured to precise dimensional standards with Class 2A thread tolerance equivalent, ensuring consistent performance. The screw requires No. 34 drill bit (0.111") for proper hole preparation in plastic materials. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.