Size in

Size Designation inches

5.30 mm 0.2087

# 4 0.2090

5.40 mm 0.2126

# 3 0.2130

5.50 mm 0.2165

7/32 inch 0.2187

5.60 mm 0.2205

# 2 0.2210

5.70 mm 0.2244

5.75 mm 0.2264

# 1 0.2280

5.80 mm 0.2283

5.90 mm 0.2323

Letter A 0.2340

15/64 inch 0.2344

6.00 mm 0.2362

Letter B 0.2380

6.10 mm 0.2402

Letter C 0.2420

6.20 mm 0.2441

Letter D 0.2460

6.25 mm 0.2461

6.30 mm 0.2480

1/4 inch 0.2500

Letter E 0.2500

6.40 mm 0.2520

6.50 mm 0.2559

Letter F 0.2570

6.60 mm 0.2598

Letter G 0.2610

6.70 mm 0.2638

17/64 inch 0.2656

6.75 mm 0.2657

Letter H 0.2660

6.80 mm 0.2677

6.90 mm 0.2717

Letter 0.2720

7.00 mm 0.2756

Letter 0.2770

7.10 mm 0.2795

Letter K 0.2811

9/32 inch 0.2812

© 2016

DRILL SIZE CHART

0.2087 TO 1.0000 INCH RANGE

Size in

Size Designation inches Size Designation

7.2 mm 0.2835 9.40 mm

7.25 mm 0.2854 9.5 mm

7.3 mm 0.2874 3/8 inch

Letter L 0.2900 Letter V

7.40 mm 0.2913 9.60 mm

Letter M 0.2950 9.70 mm

7.50 mm 0.2953 9.75 mm

19/64 inch 0.2969 9.80 mm

7.60 mm 0.2992 Letter w

Letter N 0.3020 9.90 mm

7.7 mm 0.3031 25/64 inch

7.75 mm 0.3051 10.00 mm

7.8 mm 0.3071 Letter X

7.90 mm 0.3110 Letter y

5/16 inch 0.3125 13/32 inch

8 mm 0.3150 Letter z

Letter 0 0.3160 10.5 mm

8.1 mm 0.3189 27/64 inch

8.20 mm 0.3228 11.00 mm

Letter p 0.3230 7/16 inch

8.25 mm 0.3248 11.50 mm

8.30 mm 0.3268 29/64 inch

21/64 inch 0.3281 15/32 inch

8.4 mm 0.3307 12.00 mm

Letter Q 0.3320 31/64 inch

8.5 mm 0.3346 12.50 mm

8.6 mm 0.3386 1/2 inch

Letter R 0.3390 13.00 mm

8.7 mm 0.3425 33/64 inch

11/32 inch 0.3437 17/32 inch

8.75 mm 0.3445 13.50 mm

8.8 mm 0.3465 35/64 inch

Letter s 0.3480 14 mm

8.9 mm 0.3504 9/16 inch

9 mm 0.3543 14.50 mm

Letter T 0.3580 37/64 inch

9.1 mm 0.3583 15 mm

23/64 inch 0.3594 19/32 inch

9.20 mm 0.3622 39/64 inch

9.25 mm 0.3642 15.5 mm

Letter u 0.3680 5/8 inch

9.35 mm 0.3681 16.00 mm

PEN®

7

• •

PennEng1neer1ng® www.pemnet.com

Size in

inches

0.3701

0.3740

0.3750

0.3770

0.3780

0.3819

0.3839

0.3858

0.3860

0.3898

0.3906

0.3937

0.3970

0.4040

0.4062

0.4130

0.4134

0.4219

0.4331

0.4375

0.4528

0.4531

0.4688

0.4724

0.4844

0.4921

0.5000

0.5118

0.5156

0.5313

0.5315

0.5469

0.5512

0.5625

0.5709

0.5781

0.5906

0.5938

0.6094

0.6102

0.6250

0.6299

Size in

Size Designation inches

41/64 inch 0.6406

16.5 mm 0.6496

21/32 inch 0.6563

17 mm 0.6693

43/64 inch 0.6719

11/16 inch 0.6875

17.50 mm 0.6890

45/64 inch 0.7031

18.00 mm 0.7087

23/32 inch 0.7188

18.5 mm 0.7283

47/64 inch 0.7344

19.00 mm 0.7480

3/4 inch 0.7500

49/64 inch 0.7656

19.50 mm 0.7677

25/32 inch 0.7813

20.00 mm 0.7874

51/64 inch 0.7969

20.50 mm 0.8071

13/16 inch 0.8125

21.00 mm 0.8268

53/64 inch 0.8281

27/32 inch 0.8438

21.5 mm 0.8465

55/64 inch 0.8594

22.00 mm 0.8661

7/8 inch 0.8750

22.50 mm 0.8858

57/64 inch 0.8906

23.00 mm 0.9055

29/32 inch 0.9063

59/64 inch 0.9219

23.5 mm 0.9252

15/16 inch 0.9375

24.00 mm 0.9449

61/64 inch 0.9531

24.50 mm 0.9646

31/32 inch 0.9688

25.00 mm 0.9843

63/64 inch 0.9844

1 inch 1.0000

8/02/16