Wiseman Threading Tools Bottom Lead Metric HSS Tap — Right Hand is the dependable choice for clean, accurate internal threads in metal. Built around a high-speed steel (HSS) core and ground to precise tolerances, this tap is designed for general-purpose threading with dependable performance from start to finish. The uncoated finish keeps heat flow predictable and makes cutting fluid work effectively, so you get consistent results across a range of materials.

Key features that matter in real-world machining

• Size and thread: M20x1.5, right-hand thread, suitable for standard metric fittings and components.
• Bottom lead (single-start) design: Optimized for deep, full-length threading where you need threads to extend to the bottom of the hole, reducing the need for multiple passes.
• Material: High-speed steel (HSS) with an uncoated surface blend for versatility and compatibility with most cutting fluids.
• Standards: Conforms to ISO 529 dimensions, ensuring compatibility with common metric taps and predictable thread form.
• Construction: Precisely ground threads for smooth cutting action, reduced chatter, and tighter tolerances on the final thread.

What this tap delivers for your workshop

Whether you’re repairing a tapped hole, creating new mounting threads in a steel bracket, or preparing a through-hole for a critical fastener, this tap provides reliable engagement and repeatable results. The bottom-lead design helps you approach the full thread depth with fewer passes, saving time on every project. The uncoated finish gives you straightforward tool control when using standard cutting oils, which helps reduce heat buildup and extend the tool’s life in everyday use.

Practical usage tips

• Use an appropriate cutting fluid or oil to improve chip evacuation and prolong tool life.
• Align the tap carefully with the hole, and apply steady, even pressure while turning clockwise for a right-hand thread.
• Regularly back off slightly to break chip buildup and prevent binding, especially when threading deeper holes.
• Pair with a correctly sized drill hole per your material and hole depth to optimize thread engagement and strength.

Ideal for

• Mechanical workshops, fabrication shops, and metalworking hobbyists who need dependable metric threading for M20 components.
• Repair technicians performing internal thread repairs or restorations in steel, cast iron, and other common metals.
• Projects requiring precise, full-depth threads where a single-pass bottom-lead approach is advantageous.

This Wiseman HSS tap is a robust, general-purpose solution for metric threading tasks that demand accuracy, durability, and straightforward usability. Build strong, repeatable threads with confidence, and keep your metalworking projects moving smoothly from start to finish.