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uxcell 5-40 UNC Tap and Die Set, HSS Machine Thread Tap with Round Threading Die, Right Hand

4.5 (13) Write Review
Free shipping on orders over $29.99

$11.69

$ 5 .99 $5.99

In Stock

1.Size:4-40 Unc


  • Specifications: 5-40 UNC tap and die set, right hand, 2B tolerance grade. Suitable for making or repairing male and female threads. Good for general purpose applications.
  • Application: Used for through hole processing, such as alloy steel, die steel, cast iron, ferrous and non-ferrous materials etc.. Great for maintenance and repair work.
  • Features: High speed steel (HSS) tool provides high hardness and good wear-resistance. With fine grinding process, tap and die set is sharp and durable, and with clear thread to meet the processing requirements.
  • Easy to Use: The fastening screw in the middle of the die wrench should be inserted into the slot of the die and tightened. The machine tap is suitable for drill presses, tapping machines, CNC and milling machines.
  • Tips: Used with tapping oil to get threads and more durable taps. Suitable lubricating oil should be added to the cutting edge of dies and taps when tapping.


Product Description

1

Information

When tapping, appropriate lubricating oil is good for cutting or cooling, making the cutting easier and faster, improving the smoothness and dimensional accuracy, and helping to extend the service life.

The following lubricants are recommended: steel - cutting oil, machine oil; pig iron - dry oil; aluminum - kerosene; stainless steel - mixed kerosene; hard plastic - dry oil. Be sure to select the appropriate cutting oil for complex tapping process and apply anti-rust oil for maintenance after use.

Round Threading Dies

The round dies can process, correct or clean external threads. Conical locking hole, strong locking and not loose. Great for maintenance and repair work on pipes, boards and machinery.

Applications

Perfect for rethreading existing threads in hard materials like metal, or making new threads in softer material such as plastic.

Easy to Use

Suitable for tapping stainless steel, aluminum alloy, cast iron, copper, iron, aluminum, plastic, etc.. NOT suitable for tile, concrete, walls, stone, etc.

Alloy Tool Steel Dies

  • High hardness
  • Wear resistance
  • High hardening capacity
  • Tempering resistance

Tips for Round Dies

The end of the bar should be chamfered 1*45 degree, and the chamfer is too large to cut in. The bar diameter should be smaller ( about 0.05mm-0.15mm) than the nominal diameter of the required thread. Excessive diameter can easily cause difficult cutting and lead to damage to the die teeth.

It needs to be reversed every 1/4~1/2 turn to facilitate the chip discharge from the chip hole. When tapping, add suitable lubricating oil to the cutting edge, and repeat the operation 3-4 times until the thread length is obtained. When using by hand, pay attention to even force and avoid blind force.

Straight Flute Thread Taps

Straight flute design, downward chip removal, fast tapping with accuracy. Suitable for processing through holes or shallow blind holes. Perfect for drilling and tapping aluminum, zinc, alloy etc..

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
  • High wear resistance
  • High heat resistance
  • Good process performance
  • Good strength and toughness
1

Tips for Thread Taps

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. Recommended feed rate: general steel: 6-15m/min; harder steel: 5-10m/min; stainless steel: 2-7m/min; cast iron: 8-10m/min.

The torque caused by too fast feed speed is too large, which can easily cause the tap to break. Micro taps are mainly used in clocks and watches for machining holes in wood and soft metals with low hardness.


Gralfus
2025-09-04 15:15:54
I had cut 4 custom length machine screws (no head) from allthread and was trying to use a nut to fix the threads, but this die was far more sharp and durable than a standard nut. I still had to file the edges of the screws a bit, but I'm really happy with this die. To grip the screw for repairing the threads, I used a piece of rubberized cork to hold it in a vise so that the threads were not damaged by the vise while repairing the threads at the end of the screws.
delump
2025-08-24 12:57:28
Used it for cleaning rod items. It cleans up damaged threads well.
Trent
2025-07-29 18:54:35
just needed to fix up a screw and it did its job. steel isnt soft
Keith
2025-07-19 20:48:51
Tape broke on the sixth hole I was chasing with this tap! Die does the job to clean up threads when shortening screws.
Customer
2025-06-12 18:17:21
Worked very well for the problem I had with existing tapped set up.
Mitch V
2025-06-11 16:46:55
3 stars as it breaks easily. Go slow and use plenty of cutting oil.
Elaine
2025-06-03 17:13:19
Didn't say HSS (High Speed Steel) on the product.
Robert Olbrich
2025-05-12 12:04:57
Works good
Jim
2025-03-13 13:46:13
I like the price because I will only need it once in a while. I used it to thread jags .
BJ La Trace
2025-01-21 09:50:06
As described.
Heritagecycleworks
2025-01-14 14:34:35
Good quality, good engagement to material and accurate threads. Watch the Joe Pie video on YouTube on how to make a small tap holder to use these without breaking them. And using Tap Magic will make things easier for you,
kcwcc
2024-12-17 13:54:55
My tap kit was missing these so great! I use these on plastic so can't talk to strength but it is small. Use a lot of lube and go slow on metal.
Customer
2024-12-03 15:05:55
Good value , cuts as it should