The Wiseman Threading Tools Bottom Lead Metric HSS Tap in the M36x4 size is a purpose-built, high-precision tool for cutting clean metric threads in metal. This right-hand, bottoming tap is designed to reach the full depth of a hole, making it ideal for blind holes where thread engagement to the bottom is critical. Built from uncoated high-speed steel and ground to tight tolerances, it delivers reliable, repeatable threads in a compact, durable form that seasoned machinists and serious hobbyists can count on.

Key features that matter in real-world tapping

• Right-hand M36x4 threads — metric threading with a 36 mm nominal diameter and 4 mm pitch, suitable for a wide range of mechanical assemblies.
• Bottom lead (bottoming) geometry — cuts threads all the way to the bottom of a blind hole, delivering maximum thread engagement where depth is limited.
• ISO 529 dimensions — engineered to industry standards for compatibility with other ISO 529 taps and threaded components.
• Uncoated HSS, ground finish — a general-purpose, robust cutting tool with a precise thread profile and smooth chips removal when used with appropriate cutting fluid.
• General-purpose threading tool — versatile for steel, cast iron, and many non-ferrous materials, making it a staple in workshops and production environments alike.

Why this tap is a smart choice for your workshop

When you need threads that bite reliably and extend to the bottom of the hole, a bottoming tap like this Wiseman model is essential. Its ground, uncoated HSS construction provides dependable performance across a variety of materials and drilling conditions. The M36x4 size covers a common metric specification used in heavy-duty mechanical assemblies, from machine frames to fastener housings, where full-depth threads maximize strength and prevent pull-out.

Practical use and best practices

• Pair with an appropriate tap drill size and use cutting fluid or light oil to minimize heat and improve chip evacuation.
• Begin threading with a taper or plug tap if starting a new hole, then follow with this bottoming tap to reach full depth.
• Maintain steady, perpendicular alignment to avoid thread runout; back off periodically to break chips and re-lubricate.
• After tapping, clean the hole to remove any debris and ensure smooth bolt seating and accurate engagement.

Ideal for

Machinists, metal fabricators, and dedicated workshops that require precise metric threads in tight or blind holes. The M36x4 right-hand bottoming tap excels in automotive components, machinery housings, and fabrication projects where robust, finish-ready threads are a must.

What you gain with Wiseman threading tools

With Wiseman, you’re choosing a trusted name in threading tools, backed by precision engineering and consistent performance. This bottom lead, metric HSS tap is built to endure regular tapping work, maintain accurate thread forms, and deliver dependable results project after project.