Machine Screws
Tapping & Clearance Hole Information
(sizes #8 – 3/
|
Machine Screw Size |
Number of Threads Per Inch |
Minor Dia. |
Tap Drills |
Clearance Hole Drills |
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|
Aluminum, 75% |
Stainless 50% |
All Materials |
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|
Close Fit |
Free Fit |
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|
No. or Dia. |
Major Dia. |
Drill Size |
Decimal Equiv. |
Drill Size |
Decimal Equiv. |
Drill Size |
Decimal Equiv. |
Drill Size |
Decimal Equiv. |
||
|
8 |
.1640 |
32 |
.1257 |
29 |
.1360 |
27 |
.1440 |
18 |
.1695 |
16 |
.1770 |
|
36 |
.1299 |
29 |
.1360 |
26 |
.1470 |
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|
10 |
.1900 |
24 |
.1389 |
25 |
.1495 |
20 |
.1610 |
9 |
.1960 |
7 |
.2010 |
|
32 |
.1517 |
21 |
.1590 |
18 |
.1695 |
||||||
|
12 |
.2160 |
24 |
.1649 |
16 |
.1770 |
12 |
.1890 |
2 |
.2210 |
1 |
.2280 |
|
28 |
.1722 |
14 |
.1820 |
10 |
.1935 |
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|
32 |
.1777 |
13 |
.1850 |
9 |
.1960 |
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|
1/4 |
.2500 |
20 |
.1887 |
7 |
.2010 |
7/32 |
.2188 |
F |
.2570 |
H |
.2660 |
|
28 |
.2062 |
3 |
.2130 |
1 |
.2280 |
||||||
|
32 |
.2117 |
7/32 |
.2188 |
1 |
.2280 |
||||||
|
5/16 |
.3125 |
18 |
.2443 |
F |
.2570 |
J |
.2770 |
P |
.3230 |
Q |
.3320 |
|
24 |
.2614 |
I |
.2720 |
9/32 |
.2812 |
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|
32 |
.2742 |
9/32 |
.2812 |
L |
.2900 |
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|
3/8 |
.3750 |
16 |
.2983 |
5/16 |
.3125 |
Q |
.3320 |
W |
.3860 |
X |
.3970 |
|
24 |
.3239 |
Q |
.3320 |
S |
.3480 |
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|
32 |
.3367 |
11/32 |
.3438 |
T |
.3580 |
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