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Walter 1/4-28 NF HSS Bottoming Tap

$16.28/ea $41.94/3 per each only $13.98/eaSave 14%

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OVERVIEW

Professional Grade 1/4"-28 NF Bottoming Tap

Upgrade your metalworking toolkit with the Walter 1/4"-28 NF Bottoming Tap, a high-performance solution for cutting National Fine threads. Built for fabricators and welders who encounter diverse materials, this tool excels in creating strong, precise threads in mild steel, stainless steel, and aluminum. The use of High Speed Steel (HSS) in its construction provides a significant advantage over traditional taps, offering superior hardness and resistance to heat buildup, which is critical when working with harder alloys like stainless steel.

The "bottoming" profile of this tap is its standout feature. With a chamfer length of just 1-2 threads, it is specifically designed to thread close to the bottom of a blind hole. In fabrication scenarios where you cannot drill all the way through a part, a standard taper tap would leave a significant portion of the hole unthreaded. This Walter bottoming tap solves that problem, allowing you to utilize the full depth of the drilled hole for maximum fastener engagement and holding power.

Precision manufacturing ensures that the threads cut by this tool are uniform and accurate, facilitating smooth fastener assembly. The ground threads also help in evacuating chips more efficiently, preventing binding and ensuring a smooth cutting action. Whether you are tapping a fresh hole in a custom fabrication project or repairing a stripped thread on a critical part, trust Walter's engineering to provide a tool that performs reliably cut after cut.

Features for Fabricators

  • High Speed Steel Body: Resists dulling and breakage better than carbon steel alternatives.
  • Short Chamfer: Threads to the bottom of blind holes for maximum thread engagement.
  • Versatile Performance: Cuts smoothly in aluminum, steel, and stainless steel.
Additional Information
Brand:Walter Surface Technologies
Used To Cut:Steel, Stainless Steel & Aluminum
Packaging Description:1 per each
Thread Size:1/4"-28 NF
Tap Style:Bottoming
Material:High-Speed Steel (HSS)
Thread Standard:NF (National Fine)
Application Type:Blind Holes, Thread Repair

INCLUDED

  • 1 x Walter 1/4"-28 NF Bottoming High Speed Steel Tap

APPLICATIONS

  • Creating threads in blind holes
  • Repairing damaged or stripped threads
  • Machining components made of mild steel
  • Fabrication with stainless steel
  • Working with aluminum alloys
  • General industrial maintenance and overhaul (MRO)

FAQ

A bottoming tap has a very short chamfer (1-2 threads) and is used to cut threads as close as possible to the bottom of a blind hole (a hole that doesn't go all the way through the material).

This tap cuts a 1/4"-28 NF (National Fine) thread.

Yes, this Walter tap is made from High Speed Steel (HSS), making it suitable for cutting threads in stainless steel, as well as mild steel and aluminum.

For blind holes, it is best practice to start with a taper or plug tap to establish the threads and then finish with this bottoming tap to reach the bottom of the hole.

For a 1/4"-28 NF thread, a #3 drill bit (approximately 0.213 inches) is typically recommended for 75% thread depth.

While it can be used for through holes, taper or plug taps are generally easier to start. Bottoming taps are specifically specialized for blind holes.

NF stands for National Fine, which has more threads per inch (28 TPI for 1/4") compared to NC (National Coarse, which is 20 TPI for 1/4"). Fine threads are stronger and better for vibration resistance.
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