Product Overview: HSS Multi-Purpose Spiral Flute Tap Metric – 5GS Series

【Product Features & Why We Recommend It】

• French Brand Professional Quality: Originating from a professional French cutting tool brand with rigorous quality control — recommended for users with standard demands on metric spiral blind hole tapping cost-effectiveness and multi-material versatility.
• Multi-Purpose Spiral Flute Blind Hole Versatile Design: Features a multi-purpose spiral flute tap geometry that pulls chips upward and out of the hole — recommended for metric blind hole tapping of carbon steel, alloy steel, and stainless steel, effectively addressing diverse daily machining application blind hole tapping needs with a single tool to reduce stock tool variety and management costs.
• HSS-EX Ultra-High Performance Substrate: Manufactured with HSS-EX ultra-high performance high-speed steel, delivering superior hardness, toughness, and wear resistance compared to standard HSS and HSS-CO — recommended for long-duration stable metric spiral blind hole tapping in daily machining applications, providing superior tool life compared to standard HSS.
• Black Oxide Surface Treatment: The surface is treated with black oxide (Steam Oxide) finishing, providing good lubricity and anti-adhesion characteristics — recommended for metric spiral blind hole tapping of carbon steel and stainless steel, effectively reducing friction between chips and the tool and preventing hole bottom chip accumulation.
• 72 Metric Specification Wide Coverage: Available in thread diameter 1.4–39mm and pitch 0.3–4mm across 72 specifications — recommended as the economical and practical general-purpose stock tool for daily metric blind hole spiral tapping in factories and machining centers, covering all types of metric blind hole thread requirements from small to large diameters.

【Machining Applications & Uses】

• Primary Use: Metric multi-material through-hole and blind hole daily spiral tapping, carbon steel and alloy steel precision blind hole thread forming, and stainless steel metric blind hole spiral tapping.
• Recommended Work Materials:
  • P-Class (Carbon Steel / Alloy Steel): Structural steel, carbon steel, and alloy steel — recommended for hardness below HRC30, where HSS-EX combined with black oxide treatment delivers stable daily metric blind hole tapping performance.
  • M-Class (Stainless Steel): SUS304, SUS316, and other high-toughness stainless steel — the multi-purpose spiral geometry combined with black oxide treatment effectively manages continuous chip upward evacuation and suppresses hole bottom chip accumulation, recommended for use with appropriate cutting fluid.