S-99461A971 Length 20 mm Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel material, ensuring long-term reliability in various environmental conditions.
• Excellent thread-forming capability for plastic materials, creating strong, secure threads without pre-tapping and reducing assembly steps.
• Enhanced driving efficiency with Phillips No. 1 drive, providing reliable torque transfer and minimizing cam-out during installation.
• Optimized blunt tip design prevents material splitting in plastics, ensuring clean, damage-free installations.
• Full threading along the 20mm length maximizes grip and holding power in plastic assemblies for secure, vibration-resistant connections.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and meets international standards for industrial use.
• Standard pan head profile offers a low-profile, rounded finish that sits flush and distributes clamping force evenly.

Professional Applications & Engineering Value

These M4 x 20mm thread forming tapping screws are specifically engineered to address common challenges in plastic assembly, such as material cracking and stripped threads. Made from durable 18-8 stainless steel, they resist rust and corrosion, making them ideal for electronics, automotive components, and outdoor equipment where moisture exposure is a concern. The TRS type thread forming design displaces plastic material to create precise, strong internal threads without chips, eliminating the need for additional inserts and reducing labor costs. With a 1.79mm pitch and blunt tip, these screws ensure smooth insertion and high pull-out strength, providing reliable performance in plastic fastening applications across manufacturing and industrial sectors.

Specification Summary & Compliance

This product features a metric M4 size with a length of 20mm, fully threaded for consistent engagement. It adheres to standard thread forming specifications with an approximate pitch of 1.79mm and is designed for use with a No. 30 drill bit (0.1285" diameter). The screws comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they are free from hazardous substances and suitable for global industrial applications.