Wiseman Threading Tools Taper Lead Metric HSS Tap, Right Hand — M39x3 is engineered for precise internal threading in metal with confidence. This taper-lead tap is ground from high-speed steel (HSS) and is uncoated, making it a robust, general-purpose tool designed to deliver clean, accurate threads across a range of materials. Compliant with ISO 529 dimensions, it ensures reliable compatibility with standard tapping setups and fittings.

Built for reliability in busy workshops, the taper lead geometry starts cutting smoothly, reducing bite forces at entry and guiding the tap through the hole with less effort. The right-hand thread orientation suits most conventional threading tasks, delivering consistent results from shallow to deeper threaded sections. With its uncoated finish, you get dependable performance across steel, cast iron, and certain non-ferrous metals when used with appropriate cutting fluid.

Key features at a glance

• Metric tapping tool with M39x3 right-hand thread
• High-speed steel (HSS) ground for precision and durability
• Taper lead geometry for easy entry and progressive cutting
• Uncoated surface designed for general-purpose threading
• ISO 529 compliant dimensions for compatibility with standard taps

Ideal use cases

Perfect for repairing damaged threads, creating new threads in engine blocks, housings, or equipment brackets, and tackling fabrication projects where robust internal threads are required. Suitable for professional machinists, metalworkers, and dedicated hobbyists who need dependable results without specialized coatings or exotic materials.

Practical tips for best results

Pair this tap with appropriate cutting fluid and a correctly sized drill hole to manage heat and extend tool life. Begin with steady, moderate torque, let the taper lead do the work, and maintain consistent alignment to avoid cross-threading. After tapping, deburr the hole and perform a light finishing pass to ensure full-depth, smoothly finished threads.