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uxcell Machine Tap #4-40 UNC UNC Thread 2B Class 3 Flutes High Speed Steel Screw Threading Tap Tapping Tool 3pcs

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$14.49

$ 7 .99 $7.99

In Stock

1.Size:#2-56 Unc


  • Thread Tap: Thread Size: #4-40 UNC; Class: 2B; Thread Length: 17mm / 0.67 inch; Shank Side Width: 2.5mm / 0.1 inch; Total Length: 51mm / 2.01 inch
  • High Speed Steel Tap: The screw tap has high wear resistance, fast cutting speed, high strength and hardness, and long service life. With uncoated base substrate only, suitable for general purpose tapping.
  • Wide Applications: The thread tap is suitable for drilling mild steels, aluminum, iron, copper, stainless steel, hard plastic, processing through holes or shallow holes. Add appropriate tapping oil for higher quality internal threads and more durable taps.
  • Straight Flute Tap: Straight 3 flutes are ground to provide rapid downward chip removal for efficient threading, clear threads without burrs, right hand tapping direction. Micro taps are mainly used in clocks and watches for machining holes in wood and soft metals with low hardness.
  • Machine Taps: Used in drilling machines, tapping machines, automatic machines, machining centers, CNC, milling machines, not recommended for hand and electric drill tapping. Recommended feed speed: ordinary steel: 6-15m/min; harder steel material: 5-10m/min; stainless steel: 2-7m/min; cast iron: 8-10m/min.



Product Description

1

Information

Taps can be divided into straight flute thread taps, spiral flute thread taps, spiral point thread taps and thread forming taps. They are also divided into hand taps and machine taps according to the usage. Hand taps are operated by tap wrenches. Machine taps are suggested to be used with tap collets with overload protection. Recommended feed rate: General steel: 6-15m/min; harder steel: 5-10m/min; stainless steel: 2-7m/min; cast iron: 8-10m/min.

1

Straight Flute Thread Taps

Straight flute design, downward chip removal, fast tapping with accuracy. Suitable for processing through holes or shallow blind holes.

Easy to Use

Used on drilling machines, tapping machines, CNC and milling machines. Use with tapping oil to get higher quality threads and more durable taps.

Coatings

Features just the base substrate without any additional coatings, suitable for wide ranges of applications.

High Speed Steel Taps

  • High hardness and strength, good toughness
  • Good wear resistance and heat resistance.
  • Good process performance.
  • Perfect for drilling and tapping aluminum, zinc, alloy etc..
1

Tips

  • Machine taps are suggested to be used with tap collets with overload protection. Hand use or electric drills use is easy to cause breakage to the tap, so it is not recommended.
  • Use with tapping oil to get higher quality thread and more durable taps. Cutting oil is lubrication, cooling and anti-sticking. Be sure to select the appropriate cutting oil for complex tapping process and apply anti-rust oil for maintenance after use.
Customer Reviews
4.6 out of 5 stars 85
4.4 out of 5 stars 161
4.4 out of 5 stars 121
4.3 out of 5 stars 70
3.8 out of 5 stars 68
4.0 out of 5 stars 55
Size M12X1.25 M6 x 1 1/2"-28 UNEF 3/8"-16 UNC M4.5-M6 / 8mm-20mm M4-M10 / 2mm-10mm

David
Reviewed in the United States on January 23, 2025
I’m a machinist by trade. I’ve tapped thousands of holes so I know what I’m doing. I broke all 3 of these taps in a row in aluminum. Scrapped all 3 parts. Could be bad luck, could be subpar taps, could be I should have stuck with 2 flute taps that I normally use.
Arnold G Frost
Reviewed in the United States on October 17, 2024
I received the product and after breaking several have been putting it to good use.
la
Reviewed in the United States on April 19, 2024
Worked well for taping a hole through a 1/4 steel rod. If it is set up correctly it will work well. The hole has to be the correct size and the tap has to be started perfectly straight otherwise it may break. It is a small tap size so I used a small drill chuck to hold the tap and was able to feed by hand. Back out after each 1/8 of a turn to clear the debris. Do it correctly and it will work, do it wrong and the tap may break. No issues and the 2-56 screw fit well.
Kris S
Reviewed in the United States on March 17, 2023
Works as well as the more expensive ones
Josh
Reviewed in the United States on October 1, 2023
They are brittle. I broke all three tapping holes in some 1/8” mild steel. It did get me out of a bind, and shipping was fast.
David P
Reviewed in the United States on September 23, 2021
Nice taps well made easy to use
Sparky
Reviewed in the United States on January 12, 2020
With these taps you can