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09/04/2007

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Drill Chart

 

 

 

Standard PCB Drill Size Chart

NUMBERED DRILLS AND FRACTIONS OF INCHES

  •  
  • Drill No.

    Inches

     

    Drill No.

    Inches

     

    Drill No.

    Inches

    85 .011

    53

    .0595

    9/64

    .140625

    84 .0115

    1/16

    .0625

    27

    .144

    83 .012

    52

    .0635

    26

    .147

    82 .0125        
    81 .013

    51

    .067

    25

    .1495

    80

    .0135

    50

    .070

    24

    .152

    79

    .0145

    49

    .073

    23

    .154

    1/64

    .015625

    48

    .076

    5/32

    .15625

    78

    .016

    5/64

    .078125

    22

    .157

    77

    .018

    47

    .0785

    21

    .159

    76

    .020

    46

    .081

    20

    .161

    75

    .021

    45

    .082

    19

    .166

    74

    .0225

    44

    .086

    18

    .1695

    73

    .024

    43

    .089

    11/64

    .171875

    72

    .025

    42

    .0935

    17

    .173

    71

    .026

    3/32

    .09375

    16

    .177

    70

    .028

    41

    .096

    15

    .180

    69

    .0292

           

    68

    .031

    40

    .098

    14

    .182

    1/32

    .03125

    39

    .0995

    13

    .185

    67

    .032

    38

    .1015

    3/16

    .1875

    66

    .033

    37

    .104

    12

    .189

    65

    .035

    36

    .1065

    11

    .191

    64

    .036

    7/64

    .109375

    10

    .1935

    63

    .037

       

    09

    .196

    62

    .038

    35

    .110

    08

    .199

    61

    .039

    34

    .111

    07

    .201

    60

    .040

    33

    .113

    13/64

    .203125

    59

    .041

    32

    .116

    06

    .204

    58

    .042

    31

    .120

    05

    .2055

    57

    .043

    1/8

    .125

    04

    .209

    56

    .0465

    30

    .1285

    03

    .213

    3/64

    .046875

       

    7/32

    .21875

    55

    .052

    29

    .136

    02

    .221

    54

    .055

    28

    .1405

    01

    .228

     

    LETTER DRILLS AND FRACTIONS OF INCHES (UNDER CONSTRUCTION)

     

    Drill No.

    Inches

     

    Drill No.

    Inches

     

    Drill No.

    Inches

    A .234

    27/64

    .421875

     

    15/64

    .234375

    7/16

    .4375

       
    B .238

    29/64

    .453125

       
    C .242

    15/32

    .46875

       
    D .246

    31/64

    .484375

       

    E

    .250

    1/2

    .500

       

    1/4

    .250

    33/64

    .515625

       

    F

    .257

    17/32

    .53125    

    G

    .261

    35/64

    .546875    

    17/64

    .265625

    9/16

    .5625  

    H

    .266

    37/64

    .578125    

    I

    .272

           

    J

    .277

           

    K

    .281

           

    9/32

    .28125

           
               

    L

    .290

         

    M

    .295

         

    19/64

    .296875

         

    N

    .302

       

    5/16

    .3125

         

    O

    .316

         

    P

    .323

         

    21/64

    .328125

         

    Q

    .332

         

    R

    .339

         

    11/32

    .34375

         

    S

    .348

       

    T

    .358

         

     

     

         

    23/64

    .359375

         

    U

    .368

         

    3/8

    .375

         

    V

    .377

         

    W

    .386

         

     

     

         

    25/64

    .390625

         

    X

    .397

         

    Y

    .404

         

    13/32

    .40625

               

    Z

    .413

               

     


     


     

     

     

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