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03B145 - Walter 7/8-14 NF HSS Plug Tap for Steel and Stainless

Packaging: 1 per each
$135.36/ea

Usually ships within 3-5 business days

SKU: 03B145 Categories: ,

OVERVIEW

Precision Threading with Walter High Speed Steel Taps

The Walter 7/8-14 NF Plug High Speed Steel Tap (SKU: 03B145) represents the pinnacle of threading technology for industrial applications. Designed for professionals who demand accuracy and durability, this tap is engineered from premium High Speed Steel (HSS). Unlike carbon steel alternatives, HSS retains its hardness at higher temperatures, allowing for faster cutting speeds and a significantly longer service life. Whether you are fabricating new components or repairing damaged threads in critical machinery, this tool delivers consistent, high-quality results.

Optimized Plug Chamfer Design

This specific model features a "Plug" chamfer, which is the most commonly used style for general-purpose threading. With a chamfer length of approximately 3 to 5 threads, it offers a perfect balance between starting the cut easily and threading close to the bottom of a hole. It is exceptionally effective for through-holes where the chips can be pushed forward, but it is also suitable for blind holes provided there is sufficient clearance at the bottom. The precision-ground threads ensure that every cut is clean, reducing friction and torque requirements during operation.

Versatility Across Materials

One of the standout features of Walter's HSS taps is their versatility. They are hardened and tempered to withstand the rigors of cutting through tough materials. This tap is rated for use on:

  • Aluminum: Cuts cleanly without galling.
  • Mild Steel: Provides smooth threads in structural steel.
  • Stainless Steel: Resists the work-hardening tendencies of stainless alloys.

By consolidating your tooling needs with a versatile tap like this, you reduce inventory complexity while ensuring you have the right tool for the job. Whether used in a hand tap wrench for delicate repair work or a machine tool for production runs, the Walter 03B145 stands up to the task.

Why Choose National Fine (NF) Threads?

The 7/8-14 NF specification indicates a National Fine thread profile. Fine threads have a larger minor diameter compared to coarse threads, providing a stronger cross-section and better resistance to tension and vibration. This makes the Walter 03B145 an excellent choice for automotive, aerospace, and heavy machinery applications where fastener security is paramount.

Additional Information
Packaging Description:1 per each
Brand:Walter
Thread Size:7/8-14 NF
Material:High Speed Steel (HSS)
Tap Style:Plug
Thread Standard:National Fine (NF)
Chamfer Length:3-5 Threads

INCLUDED

  • 1 x Walter 7/8-14 NF Plug High Speed Steel Tap

APPLICATIONS

  • Creating new internal threads in drilled holes
  • Repairing or cleaning damaged threads (chasing)
  • Automotive and machinery maintenance
  • Fabrication involving mild steel, stainless steel, and aluminum
  • Through-hole threading applications

FAQ

A plug tap typically has 3-5 threads chamfered, making it ideal for general use and through holes. A taper tap has a longer chamfer (7-10 threads) to help start the thread straight, while a bottoming tap has very little chamfer (1-2 threads) for threading to the bottom of a blind hole.

This tap is designed to be versatile and can effectively cut threads in aluminum, mild steel, and stainless steel due to its hardened High Speed Steel construction.

Yes, using a high-quality cutting fluid or tapping oil is highly recommended. It reduces friction, dissipates heat, clears chips, and significantly extends the life of the tap while improving thread quality.

NF stands for National Fine. It refers to the thread series. Fine threads (like 7/8-14) have more threads per inch than Coarse (NC) threads, offering higher tensile strength and better resistance to vibration loosening.

Yes, Walter HSS taps are precision-ground and durable enough for use in both manual tap wrenches and machine tapping heads, provided the correct speed and lubrication are used.

It can be used for blind holes, but because it has a plug chamfer (3-5 threads), it will not thread all the way to the very bottom. For blind holes requiring full threads to the bottom, a bottoming tap is usually used after starting with a plug tap.

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