Coarse and Fine Threaded Screw Information
All Diameters in Inches
SizeThreads/Inch Outside
Diameter
Tap Drill Body Drill
UNCUNFDiameterIndexDiameterIndex
0-80.0600 .04693/64".06251/16"
164
-
-
72
.0730 .059553.076048
256
-
-
64
.0860 .070050.089043
348
-
-
56
.0990 .0785
.0810
47
46
.104037
440
-
-
48
.1120 .0890
.0935
43
42
.116032
540
-
-
44
.1250 .1015
.1040
38
37
.128530
632
-
-
40
.1380 .1065
.1130
36
33
.144027
832
-
-
36
.1640 .136029.169518
1024
-
-
32
.1900 .1470
.1590
26
21
.19609
1224
-
-
28
.2160 .1770
.1800
16
15
.22102
1/420
-
-
28
.2500 .2010
.2130
7
3
.2750F
5/1618
-
-
24
.3125 .2570
.2720
F
I
.3230P
3/816
-
-
24
.3750 .3125
.3320
5/16"
Q
.3860W
7/1614
-
-
20
.4375 .3680
.3906
U
25/64"
.453129/64"
1/213
-
-
20
.5000 .4219
.4531
27/64"
29/64"
.515633/64"
9/1612
-
-
18
.5625 .4844
.5156
31/64"
33/64"
.578137/64"
5/811
-
-
18
.6250 .5312
.5781
17/32"
37/64"
.640641/64"
3/410
-
-
16
.7500 .6562
.6875
21/32"
11/16"
.781325/32"
7/89
-
-
14
.8750 .7656
.8125
49/64"
13/16"
.906329/32"

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