SCREW SIZE CHART
Screw
Maximum
Tap Drill
Size
Screw
Size
Diameter
Diameter
000120
#71
.026
.034
0090
#62
.038
.047
080
#56
.0465
.060
172
#53
.0595
.073
256
#50
.070
.086
348
#47
.0785
.099
440
#43
.089
.112
540
#38
.1015
.125
632
#36
.1065
.138
832
#29
.136
.164
1024
#25
.1495
.190
1032
#21
.1590
.190
1224
#16
.177
.216
DECIMAL EQUIVALENTS
1/64 — .0156
17/64 — .2656
33/64 — .5156
49/64 — .7656
1/32 — .0312
9/32 — .2812
17/32 — .5312
25/32 — .7812
3/64 — .0468
19/64 — .2969
35/64 — .5469
51/64 — .7969
1/16 — .0625
5/16 — .3125
9/16 — .5625
13/16 — .8125
5/64 — .0781
21/64 — .3281
37/64 — .5781
53/64 — .8281
3/32 — .0937
11/32 — .3437
19/32 — .5937
27/32 — .8437
7/64 — .1094
23/64 — .3594
39/64 — .6094
55/64 — .8594
1/8 — .1250
3/8 — .3750
5/8 — .6250
7/8 — .8750
9/64 — .1406
25/64 — .3906
41/64 — .6406
57/64 — .8906
5/32 — .1562
13/32 — .4062
21/32 — .6562
29/32 — .9062
11/64 — .1719
27/64 — .4219
43/64 — .6719
59/64 — .9219
3/16 — .1875
7/16 — .4375
11/16 — .6875
15/16 — .9375
13/64 — .2031
29/64 — .4531
45/64 — .7031
61/34 — .9531
7/32 — .2187
15/32 — .4687
23/32 — .7187
31/32 — .9687
15/64 — .2344
31/64 — .4844
47/64 — .7344
63/64 — .9843
1/4 — .2500
1/2 — .5000
3/4 — .7500
1 — 1.00
This data has been obtained from numerous sources.
While it is believed to be correct, we cannot assume responsibility for its use.
SEASTROM Manufacturing Co., Inc.
18006342356
456 Seastrom Street ∙ Twin Falls, Idaho 83301
Fax (208)7347222
Email: info@seastrommfg.com