S-99397A731 Length 12 mm Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic with the tri-lobe shank design that forms strong, reliable threads without pre-drilled tapping.
• Enhanced torque transmission and reduced cam-out thanks to the Torx Plus IP20 drive, ensuring efficient installation and longer tool life.
• Excellent corrosion resistance provided by the zinc-plated steel construction, increasing the screw's longevity in various environments.
• Optimized for plastic fastening applications with a blunt tip and thread-forming (TRS) design that minimizes material stress and cracking.
• Consistent and precise fastening due to the fully threaded M4.55 metric size and standard 1.59mm pitch for uniform engagement.
• Broad industrial compliance meeting RoHS 3 and REACH regulations, ensuring safety and environmental standards are upheld.
• Easy identification and compatibility with a rounded pan head and right-hand threading, facilitating quick assembly in automated or manual processes.

Professional Applications & Engineering Value

These M4.55 x 12mm zinc-plated steel TRS tapping screws are engineered to address common challenges in plastic fastening, such as material splitting and weak thread retention. The tri-lobe shank and thread-forming design create secure, high-strength threads in plastic substrates without the need for additional inserts, reducing assembly time and costs. The Torx Plus drive (IP20, T20) ensures maximum torque transfer with minimal slippage, ideal for high-volume production lines where reliability is critical. Made from durable zinc-plated steel, these screws offer robust performance in electronics, automotive components, and consumer goods, providing long-term fastening solutions that resist loosening under vibration and environmental stress.

Specification Summary & Compliance

This screw features an M4.55 metric size with a 12mm length, fully threaded design, and an approximate thread pitch of 1.59mm for precise fit. It complies with standard thread-forming (TRS) specifications for use in plastics, with a recommended drill bit size of No. 23 (0.154"). The product adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial applications requiring strict environmental and safety standards.