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Walter M4 x 0.7 HSS Taper Tap for Precision Threading

$16.92/ea $43.65/3 per each only $14.55/eaSave 14%

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OVERVIEW

Master Precision Threading with the Walter 4.0mm Taper Tap

For welders and metalworkers, the finishing touches on a fabrication project often involve drilling and tapping holes for assembly. The Walter 03D041 4.0mm Taper HSS Tap is built to make this process as smooth and error-free as possible. When working with custom brackets, mounting plates, or machinery repairs, you need a tap that bites cleanly and cuts true. This high-speed steel (HSS) tool is designed specifically to meet those needs, offering superior hardness that cuts through tough metals like stainless steel without dulling prematurely.

The "Taper" profile of this tap is its standout feature for hand-tapping applications. With a long, tapered lead of 7 to 10 threads, it acts as its own guide, helping you start the thread straight and square to the hole. This is incredibly helpful when you are tapping manually and don't have the luxury of a rigid machine setup. The gradual cutting action requires less force to turn, reducing the chance of the tap binding or snapping—a nightmare scenario that every fabricator wants to avoid. It allows for a controlled, deliberate cut that results in tight, strong threads for your M4 bolts and screws.

Beyond its ease of use, the quality of the material sets it apart. Cheap taps often wear down after a few holes, leading to ragged threads and stripped fasteners. Walter's HSS construction maintains a razor-sharp edge, ensuring that every thread you cut is clean and precise. This is particularly important when working with expensive base materials or critical structural components where thread failure is not an option. The ground threads also facilitate better chip evacuation, preventing clogging that can ruin a workpiece.

Whether you are tapping a through-hole in an aluminum plate or repairing a stripped thread in a steel frame, the Walter 4.0mm Taper Tap is a trusty companion. It bridges the gap between ease of starting and durable cutting performance, making it a must-have in your welding shop or tool chest. Pair it with a high-quality cutting fluid, and you will experience the difference that a premium cutting tool makes in your daily fabrication work.

Additional Information
Brand:Walter Surface Technologies
Size:4 mm, M4
Material:High-Speed Steel (HSS)
Style:Taper
Thread Type:Metric
Chamfer Length:7-10 Threads
Application Material:Steel, Stainless Steel, Aluminum
Packaging Description:3 per each

INCLUDED

  • 1 x Walter 4.0mm HSS Taper Tap
  • Protective packaging

APPLICATIONS

  • Creating new M4 metric threads in mild steel, stainless steel, and aluminum
  • Repairing or cleaning up damaged internal threads
  • Manual hand tapping operations requiring easy starting
  • Through-hole threading applications
  • General maintenance and fabrication assembly
  • Automotive and machinery repair

FAQ

A taper tap, like this Walter model, has a pronounced chamfer of 7-10 threads, making it easier to start a thread straight. A plug tap has a shorter chamfer (3-5 threads) and is used after the taper tap or for through holes where starting is less critical.

Yes, this tap is made from High-Speed Steel (HSS), which is hard enough and heat-resistant enough to effectively cut threads in stainless steel. Using a quality cutting lubricant is highly recommended.

For a standard M4 x 0.7mm thread, the recommended drill bit size is typically 3.3mm. Always consult a tap and drill chart for the specific thread percentage required.

While a taper tap can be used in blind holes, it will not thread all the way to the bottom due to its long chamfer. It is best used to start the thread, followed by a bottoming tap to finish the threads near the bottom of the hole.

Yes, using a tapping fluid or cutting oil is essential. It reduces friction, dissipates heat, and helps clear chips, significantly extending the life of the tap and improving thread quality.

Ground threads mean the thread form on the tap was ground into the hardened steel rather than cut before hardening. This results in much higher precision, sharper cutting edges, and better accuracy.

This is a metric tap with a nominal diameter of 4.0mm (M4).
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