View source for Drill Tap and Clearance Chart

Related: [[Fraction Inch Lookup]]

== Imperial ==

{| border="1" cellpadding="3" cellspacing="0"<tbody>
|-
| rowspan="3" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Screw Size</b>
| rowspan="3" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Major Diameter</b>
| rowspan="3" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Threads Per Inch</b>
| rowspan="3" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Minor Diameter</b>
| colspan="4" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Tap Drill</b>
| colspan="4" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Clearance Drill</b>
|-
| colspan="2" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>75% Thread for Aluminum, Brass,&amp; Plastics</b>
| colspan="2" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>50% Thread for Steel, Stainless,&amp; Iron</b>
| colspan="2" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Close Fit</b>
| colspan="2" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Free Fit</b>
|-
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Drill Size</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Decimal Equiv.</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Drill Size</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Decimal Equiv.</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Drill Size</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Decimal Equiv.</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Drill Size</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Decimal Equiv.</b>
|-
| align="center" bgcolor="#E2E2E2" class="tablesmall" | #0
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0600
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 80
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0447
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 3/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0469
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 55
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0520
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 52
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0635
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 50
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0700
|-
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | #1
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.0730
| align="center" bgcolor="#ffffff" class="tablesmall" | 64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0538
| align="center" bgcolor="#ffffff" class="tablesmall" | 53
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0595
| align="center" bgcolor="#ffffff" class="tablesmall" | 1/16
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0625
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 48
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.0760
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 46
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.0810
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| align="center" bgcolor="#ffffff" class="tablesmall" | 72
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0560
| align="center" bgcolor="#ffffff" class="tablesmall" | 53
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0595
| align="center" bgcolor="#ffffff" class="tablesmall" | 52
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0635
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| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | #2
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.0860
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 56
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0641
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 50
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0700
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 49
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0730
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 43
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.0890
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 41
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.0960
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0668
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 50
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0700
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 48
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0760
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| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | #3
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.0990
| align="center" bgcolor="#ffffff" class="tablesmall" | 48
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0734
| align="center" bgcolor="#ffffff" class="tablesmall" | 47
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0785
| align="center" bgcolor="#ffffff" class="tablesmall" | 44
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0860
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 37
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.1040
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 35
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.1100
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| align="center" bgcolor="#ffffff" class="tablesmall" | 56
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0771
| align="center" bgcolor="#ffffff" class="tablesmall" | 45
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0820
| align="center" bgcolor="#ffffff" class="tablesmall" | 43
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0890
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| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | #4
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.1120
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 40
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0813
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 43
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0890
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 41
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0960
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 32
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.1160
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 30
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.1285
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0864
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 42
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0935
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 40
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0980
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| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | #5
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.125
| align="center" bgcolor="#ffffff" class="tablesmall" | 40
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0943
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1015
| align="center" bgcolor="#ffffff" class="tablesmall" | 7/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1094
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 30
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.1285
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 29
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.1360
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.0971
| align="center" bgcolor="#ffffff" class="tablesmall" | 37
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1040
| align="center" bgcolor="#ffffff" class="tablesmall" | 35
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1100
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| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | #6
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.138
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.0997
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 36
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1065
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 32
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1160
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 27
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.1440
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 25
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.1495
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1073
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1130
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 31
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1200
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| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | #8
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.1640
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1257
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1360
| align="center" bgcolor="#ffffff" class="tablesmall" | 27
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1440
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 18
| align="center" bgcolor="#ffffff" rowspan="2" class="tablesmall" | 0.1695
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1299
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| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | #10
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.1900
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1389
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 25
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1495
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 20
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1610
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 9
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.1960
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 7
| align="center" bgcolor="#E2E2E2" rowspan="2" class="tablesmall" | 0.2010
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1517
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 21
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1590
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| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | #12
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 0.2160
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1649
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1770
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1890
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 2
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 0.2210
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1820
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1935
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1777
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1850
| align="center" bgcolor="#ffffff" class="tablesmall" | 9
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.1960
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| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 1/4
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.2500
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 20
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.1887
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 7
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.2010
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 7/32
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.2188
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | F
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.2570
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | H
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.2660
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 28
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.2062
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 3
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.2130
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 1
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.2280
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| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 5/16
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 0.3125
| align="center" bgcolor="#ffffff" class="tablesmall" | 18
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.2443
| align="center" bgcolor="#ffffff" class="tablesmall" | F
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.2570
| align="center" bgcolor="#ffffff" class="tablesmall" | J
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.2770
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | P
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 0.3230
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | Q
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 0.3320
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| align="center" bgcolor="#ffffff" class="tablesmall" | 24
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.2614
| align="center" bgcolor="#ffffff" class="tablesmall" | I
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.2720
| align="center" bgcolor="#ffffff" class="tablesmall" | 9/32
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.2812
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.2812
| align="center" bgcolor="#ffffff" class="tablesmall" | L
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.2900
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.3125
| align="center" bgcolor="#E2E2E2" class="tablesmall" | Q
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.3320
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | W
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.3860
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | X
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.3970
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.3239
| align="center" bgcolor="#E2E2E2" class="tablesmall" | Q
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.3320
| align="center" bgcolor="#E2E2E2" class="tablesmall" | S
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.3480
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.3367
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| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.3438
| align="center" bgcolor="#E2E2E2" class="tablesmall" | T
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| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 0.4375
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| align="center" bgcolor="#ffffff" class="tablesmall" | 0.3499
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| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 0.5625
| align="center" bgcolor="#ffffff" class="tablesmall" | 12
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.4603
| align="center" bgcolor="#ffffff" class="tablesmall" | 31/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.4844
| align="center" bgcolor="#ffffff" class="tablesmall" | 33/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.5156
| align="center" bgcolor="#ffffff" rowspan="3" 9%? class="tablesmall" | 37/64
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 0.5781
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 19/32
| align="center" bgcolor="#ffffff" rowspan="3" class="tablesmall" | 0.5938
|-
| align="center" bgcolor="#ffffff" class="tablesmall" | 18
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.4943
| align="center" bgcolor="#ffffff" class="tablesmall" | 33/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.5156
| align="center" bgcolor="#ffffff" class="tablesmall" | 17/32
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.5312
|-
| align="center" bgcolor="#ffffff" class="tablesmall" | 24
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.5114
| align="center" bgcolor="#ffffff" class="tablesmall" | 33/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.5156
| align="center" bgcolor="#ffffff" class="tablesmall" | 17/32
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.5312
|-
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 5/8
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.6250
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 11
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.5135
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 17/32
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.5312
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 9/16
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.5625
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 41/64
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.6406
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 21/32
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.6562
|-
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 18
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.5568
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 37/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.5781
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 19/32
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.5938
|-
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 24
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.5739
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 37/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.5781
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 19/32
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.5938
|-
| align="center" bgcolor="#ffffff" class="tablesmall" | 11/16
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.6875
| align="center" bgcolor="#ffffff" class="tablesmall" | 24
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.6364
| align="center" bgcolor="#ffffff" class="tablesmall" | 41/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.6406
| align="center" bgcolor="#ffffff" class="tablesmall" | 21/32
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.6562
| align="center" bgcolor="#ffffff" class="tablesmall" | 45/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.7031
| align="center" bgcolor="#ffffff" class="tablesmall" | 23/32
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.6562
|-
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 3/4
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.7500
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 10
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.6273
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 21/32
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.6562
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 11/16
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.6875
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 49/64
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.7656
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 25/32
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.7812
|-
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 16
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.6733
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 11/16
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.6875
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 45/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.7031
|-
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 20
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.6887
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 45/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.7031
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 23/32
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.7188
|-
| align="center" bgcolor="#ffffff" class="tablesmall" | 13/16
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.8125
| align="center" bgcolor="#ffffff" class="tablesmall" | 20
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.7512
| align="center" bgcolor="#ffffff" class="tablesmall" | 49/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.7656
| align="center" bgcolor="#ffffff" class="tablesmall" | 25/32
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.7812
| align="center" bgcolor="#ffffff" class="tablesmall" | 53/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.8281
| align="center" bgcolor="#ffffff" class="tablesmall" | 27/32
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.8438
|-
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 7/8
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.8750
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 9
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.7387
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 49/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.7656
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 51/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.7969
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 57/64
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.8906
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 29/32
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 0.9062
|-
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 14
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.7874
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 13/16
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.8125
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 53/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.8281
|-
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 20
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.8137
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 53/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.8281
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 27/32
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.8438
|-
| align="center" bgcolor="#ffffff" class="tablesmall" | 15/16
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.9375
| align="center" bgcolor="#ffffff" class="tablesmall" | 20
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.8762
| align="center" bgcolor="#ffffff" class="tablesmall" | 57/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.8906
| align="center" bgcolor="#ffffff" class="tablesmall" | 29/32
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.9062
| align="center" bgcolor="#ffffff" class="tablesmall" | 61/64
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.9531
| align="center" bgcolor="#ffffff" class="tablesmall" | 31/32
| align="center" bgcolor="#ffffff" class="tablesmall" | 0.9688
|-
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 1
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 1.000
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 8
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.8466
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 7/8
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.8750
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 59/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.9219
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 1-1/64
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 1.0156
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 1-1/32
| align="center" bgcolor="#E2E2E2" rowspan="3" class="tablesmall" | 1.0313
|-
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 12
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.8978
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 15/16
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.9375
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 61/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.9531
|-
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 20
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.9387
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 61/64
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.9531
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 31/32
| align="center" bgcolor="#E2E2E2" class="tablesmall" | 0.9688
|}

==Metric==
{| border="1" cellpadding="3" cellspacing="0"<tbody>
|-
| rowspan="2" colspan="2" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Metric Screw Size</b>
| rowspan="1" colspan="4" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Tap Drill</b>
| rowspan="1" colspan="4" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Clearance Drill</b>
|-
| rowspan="1" colspan="2" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>75% Thread for Aluminum, Brass,<br />& Plastics</b>
| rowspan="1" colspan="2" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>50% Thread for Steel, Stainless,<br />& Iron</b>
| rowspan="1" colspan="2" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Close Fit</b>
| rowspan="1" colspan="2" align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Standard Fit</b>
|-
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Screw Size<br />(mm)</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Thread Pitch<br />(mm)</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Drill Size<br />(mm)</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Closest American</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Drill Size<br />(mm)</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Closest American</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Drill Size<br />(mm)</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Closest American</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Drill Size<br />(mm)</b>
| align="center" bgcolor="#FFFFFF" class="tablesmall" | <b>Closest American</b>
|-
| M1.5
| 0.35
| 1.15
| 56
| 1.25
| 55
| 1.6
| 1/16
| 1.65
| 52
|-
| M1.6
| 0.35
| 1.25
| 55
| 1.35
| 54
| 1.7
| 51
| 1.75
| 50
|-
| M1.8
| 0.35
| 1.45
| 53
| 1.55
| 1/16
| 1.9
| 49
| 2
| 5/64
|-
| rowspan="2" colspan="1" | M2
| 0.45
| 1.55
| 1/16
| 1.7
| 51
| 2.1
| 45
| 2.2
| 44
|-
| 0.4
| 1.6
| 52
| 1.75
| 50
| 2.1
| 45
| 2.2
| 44
|-
| M2.2
| 0.45
| 1.75
| 50
| 1.9
| 48
| 2.3
| 3/32
| 2.4
| 41
|-
| M2.5
| 0.45
| 2.05
| 46
| 2.2
| 44
| 2.65
| 37
| 2.75
| 7/64
|-
| rowspan="2" colspan="1" | M3
| 0.6
| 2.4
| 41
| 2.6
| 37
| 3.15
| 1/8
| 3.3
| 30
|-
| 0.5
| 2.5
| 39
| 2.7
| 36
| 3.15
| 1/8
| 3.3
| 24
|-
| M3.5
| 0.6
| 2.9
| 32
| 3.1
| 31
| 3.7
| 27
| 3.85
| 
|-
| rowspan="2" colspan="1" | M4
| 0.75
| 3.25
| 30
| 3.5
| 28
| 4.2
| 19
| 4.4
| 17
|-
| 0.7
| 3.3
| 30
| 4.5
| 28
| 4.2
| 19
| 4.4
| 17
|-
| M4.5
| 0.75
| 3.75
| 25
| 4
| 22
| 4.75
| 13
| 5
| 9
|-
| rowspan="3" colspan="1" | M5
| 1
| 4
| 21
| 4.4
| 11/64
| 5.25
| 5
| 5.5
| 7/32
|-
| 0.9
| 4.1
| 22
| 4.4
| 17
| 5.25
| 5
| 5.5
| 7/32
|-
| 0.8
| 4.2
| 19
| 4.5
| 16
| 5.25
| 5
| 5.5
| 7/32
|-
| M5.5
| 0.9
| 4.6
| 14
| 4.9
| 10
| 5.8
| 1
| 6.1
| B
|-
| rowspan="2" colspan="1" | M6
| 1
| 5
| 8
| 5.4
| 4
| 6.3
| E
| 6.6
| G
|-
| 0.75
| 5.25
| 4
| 5.5
| 7/32
| 6.3
| E
| 6.6
| G
|-
| rowspan="2" colspan="1" | M7
| 1
| 6
| B
| 6.4
| E
| 7.4
| L
| 7.7
| N
|-
| 0.75
| 6.25
| D
| 6.5
| F
| 7.4
| L
| 7.7
| N
|-
| rowspan="2" colspan="1" | M8
| 1.25
| 6.8
| H
| 7.2
| J
| 8.4
| Q
| 8.8
| S
|-
| 1
| 7
| J
| 7.4
| L
| 8.4
| Q
| 8.8
| S
|-
| rowspan="2" colspan="1" | M9
| 1.25
| 7.8
| N
| 8.2
| P
| 9.5
| 3/8
| 9.9
| 25/64
|-
| 1
| 8
| O
| 8.4
| 21/64
| 9.5
| 3/8
| 9.9
| 25/64
|-
| rowspan="3" colspan="1" | M10
| 1.5
| 8.5
| R
| 9
| T
| 10.5
| Z
| 11
| 7/16
|-
| 1.25
| 8.8
| 11/32
| 9.2
| 23/64
| 10.5
| Z
| 11
| 7/16
|-
| 1
| 9
| T
| 9.4
| U
| 10.5
| Z
| 11
| 7/16
|-
| M11
| 1.5
| 9.5
| 3/8
| 10
| X
| 11.6
| 29/64
| 12.1
| 15/32
|-
| rowspan="3" colspan="1" | M12
| 1.75
| 10.3
| 13/32
| 10.9
| 23/64
| 12.6
| 1/2
| 13.2
| 33/64
|-
| 1.5
| 10.5
| Z
| 11
| 7/16
| 12.6
| 1/2
| 13.2
| 33/64
|-
| 1.25
| 10.8
| 27/64
| 11.2
| 7/16
| 12.6
| 1/2
| 13.2
| 33/64
|-
| rowspan="3" colspan="1" | M14
| 2
| 12.1
| 15/32
| 12.7
| 1/2
| 14.75
| 37/64
| 15.5
| 39/64
|-
| 1.5
| 12.5
| 1/2
| 13
| 33/64
| 14.75
| 37/64
| 15.5
| 39/64
|-
| 1.25
| 12.8
| 1/2
| 13.2
| 33/64
| 14.75
| 37/64
| 15.5
| 39/64
|-
| M15
| 1.5
| 13.5
| 17/32
| 14
| 35/64
| 15.75
| 5/8
| 16.5
| 21/32
|-
| rowspan="2" colspan="1" | M16
| 2
| 14
| 35/64
| 14.75
| 37/64
| 16.75
| 21/32
| 17.5
| 11/16
|-
| 1.5
| 14.5
| 37/64
| 15
| 19/32
| 16.75
| 21/32
| 17.5
| 11/16
|-
| M17
| 1.5
| 15.5
| 39/65
| 16
| 5/8
| 18
| 45/64
| 18.5
| 47/64
|-
| rowspan="3" colspan="1" | M18
| 2.5
| 15.5
| 39/65
| 16.5
| 41/64
| 19
| 3/4
| 20
| 25/32
|-
| 2
| 16
| 5/8
| 16.75
| 21/32
| 19
| 3/4
| 20
| 25/32
|-
| 1.5
| 16.5
| 21/32
| 17
| 43/64
| 19
| 3/4
| 20
| 25/32
|-
| M19
| 2.5
| 16.5
| 21/32
| 17.5
| 11/16
| 20
| 25/32
| 21
| 53/64
|-
| rowspan="3" colspan="1" | M20
| 2.5
| 17.5
| 11/16
| 18.5
| 23/32
| 21
| 53/64
| 22
| 55/64
|-
| 2
| 18
| 45/64
| 18.5
| 47/64
| 21
| 53/64
| 22
| 55/64
|-
| 1.5
| 18.5
| 47/64
| 19
| 3/4
| 21
| 53/64
| 22
| 55/64
|}