Meet the Wiseman Threading Tools Second Lead Metric HSS Tap Right Hand - M45x4.5, a precision threading instrument engineered for reliable metric hole tapping in metal. This high-speed steel tap is ground for clean, accurate threads and finished uncoated to maximize versatility across common metals and cutting fluids. Built for general purpose use, it’s a dependable addition to any machine shop, fab shop, or DIY workstation.

Two-start design for faster, cleaner tapping

The Second Lead (two-start) geometry reduces the number of turns needed to reach full depth and enhances chip clearance. The result is smoother cutting action, reduced likelihood of binding in thinner materials, and cleaner threads with fewer pass attempts—especially valuable when working with aluminum, brass, or steel.

Key specifications

• Material: High-speed steel (HSS), ground for precise threading
• Finish: Uncoated for broad compatibility with cutting fluids and a range of metals
• Thread: Right-hand, metric, M45x4.5; ISO 529 dimensions
• Lead: Second lead (two-start) design for quicker, more forgiving tapping
• Application: General purpose metric threading in metalworking projects

Ideal uses

• Creating internal metric threads in steel, aluminum, brass, or other common metals
• Repairing stripped or damaged holes in automotive, machining, or fabrication components
• Prototyping and production setups where consistent, repeatable threads matter

How to use for best results

1. Consult ISO 529 tables to choose the correct pilot hole size for M45x4.5.
2. Secure the workpiece and keep the tap aligned perpendicular to the surface.
3. Apply a suitable cutting fluid to reduce friction and heat buildup.
4. Turn the tap slowly with a tapping tool or wrench, maintaining steady pressure and watching for clean chip formation.
5. Back off periodically to break chips and prevent binding; continue until you reach the final depth.
6. Finish with a light final pass to smooth the threads, then remove the tap and wipe the area clean.

Care, compatibility, and storage

• Keep the tap clean and dry after use; remove chips to avoid scoring the threads.
• Store in a dry, organized case to preserve geometric precision.
• Use with appropriate cutting fluids to maximize tool life and performance across metals.

Why Wiseman threading tools

Wiseman’s threading tools are built for accuracy, durability, and consistent results. The two-start, second lead design on this M45x4.5 HSS tap delivers faster depth progression and improved chip clearance, making it an efficient choice for professionals and serious hobbyists who require dependable metric threading in a variety of projects.