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What are the recommended tap/ drill sizes for threaded holes? |
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Fractional
Sizes
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Drill
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Machine
Screw
Sizes
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Drill
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1/64-64
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3/64
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0-80
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3/64
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5/64-60
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1/16
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1-56
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54
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3/32-48
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49
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1-64
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53
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7/64-48
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43
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1-72
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53
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1/8/-32
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3/32
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2-56
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50
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1/8/-40
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38
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2-64
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50
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9/64-40
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32
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3-48
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47
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5/32-32
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1/8
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3-56
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45
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11/64-32
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9/64
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4-32
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45
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3/16-24
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26
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4-36
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44
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3/16-32
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22
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4-40
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43
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13/64-24
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20
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4-48
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42
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7/32-24
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16
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5-36
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40
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15/64-24
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10
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5-40
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38
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1/4-20
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7
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5-44
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37
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1/4-20
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3
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6-32
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36
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5/16-18
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F
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6-36
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34
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5/16-24
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I
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6-40
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33
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3/8-16
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5/16
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7-30
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31
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3/8-24
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Q
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7-32
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31
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7/16-14
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U
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7-36
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118
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7/16-20
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25/64
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8-30
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30
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1/2-12
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27/64
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8-32
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29
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1/2-13
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27/64
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8-36
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29
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1/2-20
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29/64
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8-40
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28
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9/16-12
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31/64
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9-24
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29
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9/16-18
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33/64
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9-30
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27
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5/8-11
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17/32
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9-32
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26
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5/8-18
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37/64
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10-24
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25
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11/16-11
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19/32
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10-28
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23
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11/16-16
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5/8
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10-30
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22
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3/4-10
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21/32
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10-32
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21
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3/4-16
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11/16
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12-24
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16
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13/16-10
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23/32
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12-28
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14
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7/8-9
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49/64
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12-32
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13
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7/8-14
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13/16
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14-20
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10
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15/16-9
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53/64
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14-24
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7
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1-8
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7/8
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1-14
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15/16
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1-1/8-7
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63/64
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1-1/8-12
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1-3/64
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1-1/4-7
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1-7/64
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1-1/4-12
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1-11/64
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1-3/8-6
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1-13/64
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1-3/8-12
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1-18/64
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1-1/2-6
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1-11/32
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1-1/2-12
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1-27/64
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1-5/8-5-1/2
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1-28/64
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1-3/4-5
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1-9/16
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1-7/8-5
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1-11/16
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2-4-1/2
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1-25/32
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Pipe Thread
|
Drill
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1/8-27
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11/32
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1/4-18
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7/16
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3/8-18
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37/64
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1/2-14
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23/32
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3/4-14
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59/64
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1-11-1/2
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11693
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1-1/4-11-1/2
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1-1/2
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2-11-1/2
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2-7/32
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3-8
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3-1/4
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3-1/2-8
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3-3/4
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4-8
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4-1/4
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Metric Sizes
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Drill
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2x.4
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1.6
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2.5x.45
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2.0
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3x.5
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2.5
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3.5x.6
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2.9
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4x7
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3.3
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4.5x.75
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3.75
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5x.8
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4.2
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6x1.0
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5.0
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7x1.0
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6.0
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8x1.25
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6.8
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9x1.25
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7.8
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10x1.5
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8.6
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11 x 1.5
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9.6
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12x1.75
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10.5
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14x2.0
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12.0
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16x2.0
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14.0
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18x2.5
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15.5
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20x2.5
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17.5
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22x2.5
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19.5
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24x3.0
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21.0
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30x3.5
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26.5
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36x4.0
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32.0
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FAQ