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Walter 9/16-12 UNC HSS Bottoming Tap for Blind Holes

$64.30/ea $55.30/1 per each only $55.30/eaSave 14%

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OVERVIEW

Get the Job Done Right with Walter Bottoming Taps

When you are tapping a hole that doesn't go all the way through the metal, you know the frustration of not being able to get threads all the way to the bottom. That is where the Walter 9/16-12NC Bottoming Tap (SKU: 03B093) comes in. Designed specifically for finishing blind holes, this tap features a very short chamfer that allows it to cut threads right down to the bottom of the hole. It is the perfect tool to follow up a taper or plug tap to ensure your bolts have maximum grip.

Built tough for the shop environment, this tap is made from high-quality High Speed Steel (HSS). Unlike cheaper carbon steel taps that dull quickly or snap under pressure, Walter's HSS taps are tempered to handle the heat and stress of cutting through tough metals. Whether you are fabricating a custom bracket out of mild steel, repairing a thread in an aluminum casting, or working on a stainless steel project, this tap bites in and cuts clean, precise threads every time.

Using the right tool saves you time and money. A broken tap in a blind hole is a nightmare to remove, often ruining the workpiece. Walter's precision-ground threads reduce the friction that causes binding and breakage, giving you a smooth cutting action. The 9/16"-12 NC size is a standard coarse thread used in countless heavy-duty applications, making this a must-have addition to your tap and die set. Don't settle for shallow threads; get the full engagement you need with a quality bottoming tap.

Ideally suited for maintenance, repair, and operations (MRO) as well as custom fabrication, this tool offers the reliability professional welders and mechanics demand. Pair it with a good quality cutting fluid to extend its life even further and ensure the smoothest possible finish on your threads. When precision and durability matter, trust Walter Surface Technologies to deliver the edge you need.

Additional Information
Brand:Walter Surface Technologies
Item:Threading Tap
Used To Cut:Steel, Stainless Steel & Aluminum
Thread Size:9/16"-12 NC
Tap Style:Bottoming
Material:High-Speed Steel (HSS)
Thread Standard:UNC (Unified National Coarse)
Chamfer Length:1-2 Threads
Packaging Description:1 per each

INCLUDED

  • 1 x Walter 9/16"-12 NC Bottoming High Speed Steel Tap
  • Protective packaging

APPLICATIONS

  • Creating threads in blind holes (holes that do not go through the material)
  • Threading mild steel, stainless steel, and aluminum components
  • Repairing damaged or stripped threads in machinery
  • Automotive and heavy equipment maintenance
  • Custom metal fabrication and assembly

FAQ

A bottoming tap has a very short chamfer (1-2 threads) allowing it to thread close to the bottom of a blind hole. A plug tap has a longer chamfer (3-5 threads) and is better for general purpose threading but cannot thread as deep into a blind hole.

Yes, the Walter 03B093 is made from High Speed Steel (HSS) which is durable enough to cut threads in stainless steel, as well as mild steel and aluminum.

For a 9/16"-12 NC thread, the standard recommended drill bit size is typically 31/64".

Yes, using a high-quality cutting oil or tapping fluid is highly recommended to reduce friction, dissipate heat, and extend the life of the tap, especially when working with harder metals.

While it can be used to start a thread, it is much more difficult due to the lack of a tapered lead. It is best practice to start the thread with a taper or plug tap and then finish the bottom of the hole with this bottoming tap.

NC stands for National Coarse, which refers to the thread pitch standard. It is synonymous with UNC (Unified National Coarse).

This tap is manufactured from High Speed Steel (HSS), which offers superior hardness and heat resistance compared to carbon steel taps.
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