S-99397A772 Length 16 mm Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ensuring long-lasting performance in demanding industrial environments
• Enhanced torque transmission through Torx Plus IP20 drive, reducing cam-out and tool wear while improving assembly efficiency
• Reliable thread forming in plastics with TRS Tri-Lobe shank design, creating strong, vibration-resistant threads without chip formation
• Optimized plastic fastening with 1.59mm pitch and blunt tip design, minimizing stress cracking in plastic components
• Secure seating and professional appearance with 8mm pan head profile, providing consistent clamping force and clean finished look
• Full 16mm thread engagement ensuring maximum holding power and uniform stress distribution in plastic assemblies
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global manufacturing requirements

Professional Applications & Engineering Value

These M4.55 TRS thread forming screws are specifically engineered to address common challenges in plastic fastening applications where material integrity and joint reliability are critical. The 18-8 Stainless Steel construction provides excellent corrosion resistance while the Tri-Lobe shank design displaces plastic material during installation, creating strong, permanent threads without generating chips that could compromise electronic components. The Torx Plus IP20 drive system delivers superior torque transmission, preventing stripping and ensuring consistent installation force across high-volume production runs. With their 1.59mm pitch and fully threaded 16mm length, these screws distribute stress evenly throughout plastic assemblies, reducing the risk of stress cracking and material failure in automotive components, electronics enclosures, and industrial equipment where vibration resistance is essential.

Specification Summary & Compliance

These metric thread forming screws feature M4.55 diameter with 1.59mm pitch and 16mm fully threaded length. The TRS (Thread Rolling Screw) design with Tri-Lobe shank cross-section ensures precise thread formation in plastics when used with recommended No. 23 drill bit (0.154" diameter). Manufactured to industry standards with Class 2A thread tolerance and right-hand threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for use in global industrial applications.