0-80

1-64

1-72

2-56

2-64

3-48

3-56

4-40

4-48

5-40

5-44

6-32

6-40

8-32

8-36

10-24

10-32

12-24

12-28

1/4-20

1/4-28

5/16-18

5/16-24

3/8-16

3/8-24

7/16-147/16-20

1/2-13

1/2-20

9/16-12

9/16-18

5/8-11

5/8-18

11/16-1111/16-163/4-10

3/4-16

7/8-9

7/8-14

1-8

1-12

1-14

1-1/8-7

1-1/8-12

1-1/4-7

1-1/4-12

1-3/8-6

1-3/8-12

1-1/2-6

1-1/2-12

74718159686774627056787069567465726171657263726469607462706076697568757377707770667067726678707469

7570757568756474678469826076638260757581697270736279627464826879627365826781736481678166816669628066

7.75mm8.50mm

Q8.70mm11/329.50mm3/8

10.20mmY

10.80mm27/64

12.00mm15/32

12.50mm14.00mm35/64

14.50mm15.50mm39/64

16.50mm17.50mm11/16

19.50mm49/64

21.00mm53/64

24.00mm15/16

26.50mm1-3/64

29.50mm1-11/64

563/645453

1.50mm5351505049485/6446454443

2.35mm4239383837367/643332

3.40mm29299/64

3.70mm255/3221

11/6417161597

13/643

5.50mmFG

6.80mmI

5/16O

Q8.50mm

UW

25/6427/64

11.00mm11.40mm29/6415/3231/641/233/6417/3235/649/1637/6419/325/841/6421/3211/16

17.50mm49/6425/3251/6413/167/857/6429/3259/6459/6415/1663/64I

1-1/321-3/641-3/321-7/641-1/81-5/321-11/641-13/641-19/641-9/321-19/641-11/321-23/641-13/321-27/64

1.6x.351.8x.352.0x.4

2.2x.452.5x.45

3.0x.5

3.5x.6

4.0x.7

4.5x.75

5.0x.8

5.5x.9

6.0x.75

6.0x1.0

7.0x.75

7.0x1.0

8.0x1.25

8.0x1.0

9.0x1.2510x1.5

10x1.25

11x1.5

12x1.75

12x1.25

14x2.0

14x1.516x2.0

16x1.518x2.5

18x1.520x2.5

22x2.5

24x3.0

27x3.0

30x3.5

33x3.5

Tap Drill SizesTap Size

1.25mm1.45mm1.60mm

521.75mm2.05mm

462.50mm

402.90mm

333.30mm

303.70mm

264.20mm

194.60mm

145.30mm

45.00mm

96.30mm

D6.00mm15/646.70mm17/647.00mm

J

69696966706967687068726973747069686867747370717472707374716966

7371757371707174716772727671727671737470737473757372737874737472

1/16”-271/8”-271/4”-183/8”-181/2”-143/4-141”-111-1/4”-111-1/2”-112”-112-1/2”-8

CQ

7/169/1645/6429/321-9/641-31/641-23-322-3/162-5/8

1/4Q

7/1637/6445/6459/641-5/321-1/21-47/642-13/642-21/32

Metric Tap Drill SizesTap Drill

Size% of

ThreadTap Size

Tap DrillSize

% ofThread

Pipe Tap Drill Sizes

Tap Size

Tap DrillSize

% ofThread

Tap Size

Tap DrillSize

% ofThread

Tap Size NPT Tap Drill NPS Tap Drill

© Copyright 2011 Champion Cutting Tool Corp.

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DecimalCard_0111:Layout 1 2/1/11 3:22 PM Page 1

www.championcuttingtool.com

Drills • Magnetic Drill Presses • Annular Cutters • Taps • Dies • Reamers • Carbide BursCarbide Tipped Hole Cutters • Countersinks • Step Drills • End Mills • Masonry Drills & Chisels

.0135

.0145

.0156

.0160

.0180

.0197

.0200

.0210

.0225

.0240

.0250

.0260

.0280

.0292

.0310

.0312

.0320

.0330

.0350

.0360

.0370

.0380

.0390

.0394

.0400

.0410

.0420

.0430

.0465

.0469

.0520

.0550

.0591

.0595

.0625

.0635

.0669

.0670

.0700

.0730

.0760

.0781

.0785

.0787

.0810

.0820

.0860

.0890

.0935

.0938

.0960

.0980

.0984

.0995

.1015

.1040

.1065

.1094

.1100

.1110

.1130

.1160

.1181

.1200

.1250

.1285

.1360

.1378

.1405

.1406

.1440

.1470

.1495

.1520

.1540

.1562

.1570

.1575

.1590

.1610

.1660

.1695

.1719

.1730

.1770

.1772

.1800

.1820

.1850

.1875

.1890

.1910

.1935

.1960

.1969

.1990

.2010

.2031

.2040

.2055

.2090

.2130

.2165

.2188

.2210

.2280

.2340

.2344

.2362

.2380

.2420

.2460

.2500

.2559

.2570

.2610

.2656

.2660

.2720

.2756

.2770

.2810

.2812

.2900

.2950

.2953

.2969

.3020

.3125

.3150

.3160

.3230

.3281

.3320

.3346

.3390

.3438

.3480

.3543

.3580

.3594

.3680

.3740

.3750

.3770

.3860

.3906

.3937

.3970

.4040

.4062

.4130

.4134

.4219

.4331

.4375

.4528

.4531

.4688

.4724

.4844

.4921

.5000

.5118

.5156

.5312

.5315

.5469

.5512

.5625

.5709

.5781

.5906

.5938

.6094

.6102

.6250

.6299

.6406

.6496

.6562

.6693

.6719

.6875

.6890

.7031

.7087

.7188

.7283

.7344

.7480

.7500

.7656

.7677

.7812

.7874

.7969

.8071

.8125

.8268

.8281

.8438

.8465

.8594

.8661

.8750

.8858

.8906

.9055

.9062

.9219

.9252

.9375

.9449

.9531

.9646

.9688

.9843

.98441.0000

80791/64"7877.50mm7675747372717069681/32"676665646362611.00mm60595857563/64"55541.50mm531/16"521.70mm515049485/64"472.00mm

46454443423/32"41402.50mm393837367/64"353433323.00mm311/8"30293.50mm289/64"27262524235/32"224.00mm2120191811/64"17164.50mm1514

133/16"12111095.00mm8713/64"65435.50mm7/32"21A15/64"6.00mmBCD1/4" E6.50mmFG17/64"HI7.00mmJK9/32"LM7.50mm19/64"N5/16"8.00mmOP

21/64"Q8.50mmR11/32"S9.00mmT23/64"U9.50mm3/8"VW25/64"10.00mmXY13/32"Z10.50mm27/64"11.00mm7/16"11.50mm29/64"15/32"12.00mm31/64"12.50mm1/2"13.00mm33/64"17/32"13.50mm35/64"14.00mm9/16"14.50mm37/64"15.00mm19/32"39/64"15.50mm

5/8"16.00mm41/64"16.50mm21/32"17.00mm43/64"11/16"17.50mm45/64"18.00mm23/32"18.50mm47/64"19.00mm3/4"49/64"19.50mm25/32"20.00mm51/64"20.50mm13/16"21.00mm53/64"27/32"21.50mm55/64"22.00mm7/8"22.50mm57/64"23.00mm29/32"59/64"23.50mm15/16"24.00mm61/64"24.50mm31/32"25.00mm63/64"1”

Decimal Equivalents/Drill SizesFractional, Wire, Letter, Metric

Decimal Drill Size Decimal Drill Size Decimal Drill Size Decimal Drill Size Decimal Drill Size

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