Tap Drill Chart – Centimeters and Inches

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Tap drill chart in centimeters and inches (2)

Tap Drill Chart – Centimeters and Inches

26th May, 2021

Tap Drill Chart in Centimeters and Inches

tap drill chart download
Tap Size Cutting Taps Forming Taps CL Hole/Normal Fit CL Hole/Close Fit 75% Thread for Aluminium, Brass, & Plastics 50% Thread for Steel, Stainless , & Iron
Inch Metric Drill Size Dec. Eq./ Inches CM Drill Size Dec. Eq/ Inches CM Closest Fractional Inch mm Inch mm Drill Size Dec. Eq. Drill Size Dec. Eq.
0-80 3/64 0.0469 0.1191 54 0.055 0.1397 3/64″ 0.073 1.8542 0.067 1.7018 3/64 0.0469 55 0.052
M1.6 X 0.35 1.25MM 0.0492 0.1250 1.45MM 0.0571 0.1450
M1.8 X 0.35 1.45MM 0.0571 0.1450 1.65MM 0.065 0.1651
1-64 53 0.0595 0.1511 51 0.067 0.1702 0.089 2.2606 0.081 2.0574 53 0.0595 1/16 0.0625
1-72 53 0.0595 0.1511 51 0.067 0.1702 1/16″ 0.089 2.2606 0.081 2.0574 53 0.0595 52 0.0635
M2 X 0.40 1.60MM 0.063 0.1600 1.80MM 0.0709 0.1801
2-56 50 0.07 0.1778 5/64 0.0781 0.1984 0.106 2.6924 0.094 2.3876 50 0.07 49 0.073
2-64 50 0.07 0.1778 47 0.0785 0.1994 0.106 2.6924 0.094 2.3876 50 0.07 48 0.076
M2.2 X 0.45 1.75MM 0.0689 0.1750 2.00MM 0.0787 0.1999
M2.5 X 0.45 2.05MM 0.0807 0.2050 2.30MM 0.0906 0.2301
3-48 47 0.0785 0.1994 43 0.089 0.2261 5/64″ 0.12 3.048 0.106 2.6924 47 0.0785 44 0.086
3-56 46 0.081 0.2057 2.3 0.0905 0.2299 0.12 3.048 0.106 2.6924 45 0.082 43 0.089
4-40 43 0.089 0.2261 38 0.1015 0.2578 3/32″ 0.136 3.4544 0.125 3.175 43 0.089 41 0.096
4-48 42 0.0935 0.2375 2.6 0.1024 0.2601 3/32″ 0.136 3.4544 0.125 3.175 42 0.0935 40 0.098
M3 X 0.50 2.50MM 0.0984 0.2499 7/64 0.1094 0.2779
5-40 38 0.1015 0.2578 33 0.113 0.2870 0.154 3.9116 0.141 3.5814 38 0.1015 7/64 0.1094
5-44 37 0.104 0.2642 2.9 0.1142 0.2901 0.154 3.9116 0.141 3.5814 37 0.104 35 0.11
M3 X 0.60 2.90MM 0.1142 0.2901 3.20MM 0.126 0.3200
6-32 36 0.1065 0.2705 1/8 0.125 0.3175 7/64″ 0.17 4.318 0.154 3.9116 36 0.1065 32 0.116
6-40 33 0.113 0.2870 3.25 0.128 0.3251 0.17 4.318 0.154 3.9116 33 0.113 31 0.12
M4 X 0.70 3.30MM 0.1299 0.3299 3.70MM 0.1476 0.3749
8-32 29 0.136 0.3454 25 0.1495 0.3797 0.194 4.9276 0.18 4.572 29 0.136 27 0.144
8-36 29 0.136 0.3454 24 0.152 0.3861 9/64″ 0.194 4.9276 0.18 4.572 29 0.136 26 0.147
M4.5 X 0.75 3.70MM 0.1476 0.3749 4.10MM 0.1614 0.4100
10-24 26 0.147 0.3734 11/64 0.1719 0.4366 5/32″ 0.221 5.6134 0.206 5.2324 25 0.1495 20 0.161
10-32 21 0.159 0.4039 16 0.177 0.4496 5/32″ 0.221 5.6134 0.206 5.2324 21 0.159 18 0.1695
M5 X 0.75 4.20MM 0.1654 0.4201
12-24 16 0.177 0.4496 8 0.199 0.5055 11/64″ 16 0.177 12 0.189
12-28 15 0.18 0.4572 7 0.201 0.5105 3/16″ 14 0.182 10 0.1935
M6 X 1.00 5.00MM 0.1969 0.5001 7/32 0.2188 0.5558
1/4-20 7 0.201 0.5105 1 0.228 0.5791 13/64″ 0.281 7.1374 0.266 6.7564 7 0.201 7/32 0.2188
1/4-28 3 0.213 0.5410 15/64 0.234 0.5944 7/32″ 0.281 7.1374 0.266 6.7564 3 0.213 1 0.228
M7 X 1.00 6.00MM 0.2362 0.5999 F 0.257 0.6528
5/16-18 F 0.257 0.6528 L 0.29 0.7366 17/64″ 0.344 8.7376 0.328 8.3312 F 0.257 J 0.277
5/16-24 I 0.272 0.6909 M 0.295 0.7493 0.344 8.7376 0.328 8.3312 I 0.272 9/32 0.2812
M8 X 1.25 6.70MM 0.2638 0.6701 7/40 0.2913 0.7399
M8 X 1.0 7.00MM 0.2756 0.7000 19/64 0.2969 0.7541
3/8-16 5/16 0.3125 0.7938 S 0.348 0.8839 5/16″ 0.406 10.3124 0.391 9.9314 5/16 0.3125 Q 0.332
3/8-24 Q 0.332 0.8433 T 0.358 0.9093 21/64″ 0.406 10.3124 0.391 9.9314 Q 0.332 S 0.348
M10 X 1.50 8.50MM 0.3346 0.8499 U 0.368 0.9347
M10 X 1.25 8.70MM 0.3425 0.8700 9.4 0.3701 0.9401
7/16-14 U 0.368 0.9347 Y 0.404 1.0262 23/64″ U 0.368 25/64 0.3906
7/16-20 25/64 0.3906 0.9921 Z 0.413 1.0490 25/64″ 25/64 0.3906 13/32 0.4062
M12 X 1.75 10.20MM 0.4016 1.0201 11.2 0.4409 1.1199
M12 X 1.25 10.80MM 0.4252 1.0800 11.5 0.4528 1.1501
1/2-13 27/64 0.4219 1.0716 15/32 0.4682 1.1892 27/64″ 0.531 13.4874 0.516 13.1064 27/64 0.4219 29/64 0.4531
1/2-20 29/64 0.4531 1.1509 12.25 0.4823 1.2250 29/64″ 0.531 13.4874 0.516 13.1064 29/64 0.4531 15/32 0.4688
M14 X 2.00 12.00MM 0.4224 1.0729 33/64 0.5156 1.3096
9/16-12 31/64 0.4844 1.2304 17/32 0.5312 1.3492 31/64″ 31/64 0.4844 33/64 0.5156
9/16-18 33/64 0.5156 1.3096 13.5 0.5315 1.3500 33/64″ 33/64 0.5156 17/32 0.5312
5/8-11 17/32 0.5312 1.3492 14.75 0.5807 1.4750 17/32″ 17/32 0.5312 9/16 0.5625
5/8-18 37/64 0.5781 1.4684 15.25 0.6004 1.5250 37/64″ 37/64 0.5781 19/32 0.5938
M16 X 2.00 14.00MM 0.5512 1.4000 19/32 0.5938 1.5083
M16 X 1.50 14.50MM 0.5906 1.5001 15.25 0.6004 1.5250
M18 X 2.50 15.50MM 0.6102 1.5499 39/64 0.6094 1.5479
M18 X 1.50 16.50MM 0.6496 1.6500 17.25 0.6791 1.7249
3/4-10 21/32 0.6562 1.6667 45/64 0.7031 1.7859 21/32″ 21/32 0.6562 11/16 0.6875
3/4-16 11/16 0.6875 1.7463 23/32 0.7188 1.8258 11/16″ 11/16 0.6875 45/64 0.7031
M20 X 2.50 17.50MM 0.689 1.7501
M20 X 1.50 18.50MM 0.7283 1.8499
M22 X 2.50 19.50MM 0.7677 1.9500
M22 X 1.50 20.50MM 0.8071 2.0500
7/8-9 49/64 0.7656 1.9446 49/64″ 49/64 0.7656 51/64 0.7969
7/8-14 13/16 0.8125 2.0638 13/16″ 13/16 0.8125 53/64 0.8281
M24 X 3.00 21.00MM 0.8268 2.1001
M24 X 2.00 22.00MM 0.8661 2.1999
1-8 7/8 0.875 2.2225 7/8″ 7/8 0.875 59/64 0.9219
1-12 59/64 0.9219 2.3416 59/64″ 15/16 0.9375 61/64 0.9531
M27 X 3.00 24.00MM 0.9449 2.4000
M27 X 2.00 25.00MM 0.9843 2.5001
1-1/8-7 63/64 0.9844 2.5004 63/64″
1-1/8-12 1-3/64 1.0469 2.6591 1 3/64″
M30 X 3.50 26.50MM 1.0433 2.6500
M30 X 2.00 28.00MM 1.1024 2.8001
1-1/4-7 1-7/64 1.1094 2.8179 1 7/64″
1-1/4-12 1-11/64 1.1719 2.9766 1 11/64″
M33 X 3.50 29.50MM 1.1614 2.9500
M33 X 2.00 31.00MM 1.2205 3.1001
1-3/8-6 1-7/32 1.2188 3.0958 1 7/32″
1-3/8-12 1-19/64 1.2969 3.2941 1 19/64″
M36 X 4.00 32.00MM 1.2598 3.1999
M36 X 3.00 33.00MM 1.2992 3.3000
1-1/2-6 1-11/32 1.3438 3.4133 1 11/32″
1-1/2-12 1-27/64 1.4219 3.6116 1 27/64″
M39 X 4.00 35.00MM 1.378 3.5001
M39 X 3.00 36.00MM 1.4173 3.5999
tap drill chart download

For those of you looking for some of the basics on tap and drill, size and threads, how to use a drill and tap chart and drill bits, we’ll answer some questions below on this page.

 

How Do I know What Size Drill to Tap?

 

For Metric threads, you can calculate the tapping drill by subtracting the pitch from the diameter of the thread. 

 

Here is an example, for an M5x0. 75 thread the tapping drill is 5-0.75mm = 4.25mm. For Imperial (inch) threads the tapping drill size is calculated in the same way, diameter minus pitch.

 

How to Read a Tap Drill Chart?

 

Reading a tap drill chart is simple, taking our tap drill size chart as an example, simply scroll through the left-hand column and find the tap drill size you need, on the right you’ll find a column with the drill bit you need. You can find a drill and tap chart pdf here; it’s a completely free printable tap drill chart that we hope can help you in your operations.

 

You might be interested in: DFM Electronics Guidelines 

 

How to Use a Tap Drill Chart?

 

The best thing to do is find a tap drill clearance chart you can print, just like the one we offer in this article and print it for your lab so your team can easily access it. A drill size chart contains drill sizes and thread data that is so large that is almost impossible for a mechanical engineer to remember it all.

 

The proliferation of fittings and connectors makes correct thread identification a difficult and exhausting task even for the most experienced technician or mechanical engineers; there’s always a new thread out there. While there are common threads like the American pipe thread, the unified thread; there are many unfamiliar threads.

 

When it comes to drill bit sizes, there at least 153, those are the ones I can recall right now, there could be more, hence the need for a drill size chart with thread information.

 

What is a Drill Bit and Thread?

 

A drill bit is a cutting tool which purpose is to remove material to create a hole, it will most likely always be a cross section circular shape. Drill Bits come in many sizes and shapes. The thread or threading on the sides of the hole is needed to hold the screws or bolts in place.

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Eulises Quintero

Currently working as the content manager for TITOMA. With an extensive background in content marketing and a real interest in electronic products I'm able to produce some of the pieces of content you'll find here, all with the help of the TITOMA team of course. On my free time I like to travel, explore and work out.

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