Tap And Drill Chart
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1
2
3Tap and Drill Chart
(Recommended tap drill to use for 75% depth of thread)
800-871-5022
To Tap this Size Screw
Use This
(Closest
Decimal
More information can be found at
Or Bolt:
Drill Bit:
Fractional:)
Inches
0-80 NF
3/64"
3/64"
.0469
1-64 NC
#53
-
.0595
1-72 NF
#53
1/16"
.0595
2-56 NC
#50
-
.0700
2-64 NF
#50
-
.0700
3-48 NC
#47
5/64"
.0785
3-56 NF
#45
-
.0820
4-36 NS
#44
-
.0860
4-40 NC
#43
3/32"
.0890
4-48 NF
#42
3/32"
.0935
3mm- .060mm
2.5mm
-
.0984
1/8-40 NS
#38
-
.1015
5-40 NC
#38
-
.1015
5-44 NF
#37
-
.1040
6-32 NC
#35
7/64"
.1100
6-36 NS
#34
-
.1110
6-40 NF
#33
-
.1130
6-48 NS
#31
-
.1200
4mm-0.70mm
3.4mm
-
.1338
4mm-.075mm
3.4mm
-
.1338
8-32 NC
#29
-
.1360
8-36 NF
#29
9/64"
.1360
8-40 NS
#28
-
.1405
3/16-24 NS
#26
-
.1470
10-24 NC
#25
5/32"
.1495
3/16-32 NS
#22
-
.1570
10-32 NF
#21
5/32"
.1590
5mm-.090mm
4.2mm
-
.1653
5mm-.080mm
4.3mm
-
.1693
12-24 NC
#16
11/64"
.1770
12-28 NF
#14
3/16"
.1820
12-32 NEF
#13
-
.1850
14-20 NS
#10
-
.1935
1//4-20 NC
#7
13/64"
.2010
14-24 NS
#7
-
.2010
6mm-1.00mm
5.2mm
-
.2047
1/4-24 NS
#4
-
.2090
1/4-28 NF
#3
7/32"
.2130
1/4-32 NEF
7/32"
7/32"
.2188
1/4-40 NS
#1
-
.2280
7mm-1.00mm
6.1mm
15/64"
.2401
5/16-18 NC
Ltr.F
17/64"
.2570
8mm-1.25mm
6.9mm
17/64"
.2716
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