Suggested
Hole Sizes for Die Casting of Machine Screws and Fasteners
Elgin Fastener Group threaded fasteners, machine screws and small diameter fasteners are available in various sizes, threads and diameters. The chart below lists the suggested hole sizes for die casting.
The minimum length of thread engagement should be equal to twice
the diameter of the screw. The hole diameter, to ensure optimum
performance, should provide for 65% to 75% thread engagement.
|
|
Screw
Size |
Hole
Diameter as
Cast Std. Taper |
F
Hole
Dia.
as
Drilled |
L
Length
of Thread
Engage-
ment |
H
Boss
Dia.
Max. |
J
Distance
to Edge
for no
Measurable
Distortion - Min. |
|
A
- Top |
B
- Bottom |
|
Max. |
Min. |
Max. |
Min. |
|
M2
x 0.40 |
1.91 |
1.83 |
1.81 |
1.73 |
1.81 |
4.00 |
3.32 |
1.04 |
|
2-56 |
.081 |
.078 |
.077 |
.074 |
.077 |
.172 |
.197 |
.046 |
|
M2.5x0.45 |
2.39 |
2.31 |
2.28 |
2.20 |
2.28 |
5.00 |
4.15 |
0.55 |
|
3-48 |
.093 |
.090 |
.088 |
.085 |
.088 |
.198 |
.208 |
.054 |
|
M3x0.5 |
2.90 |
2.82 |
2.76 |
2.68 |
2.76 |
6.00 |
4.98 |
0.61 |
|
5-40 |
.118 |
.115 |
.112 |
.109 |
.112 |
.250 |
.232 |
.065 |
|
M3.5x0.6 |
3.31 |
3.23 |
3.21 |
3.13 |
3.21 |
7.00 |
5.81 |
0.74 |
|
6-32 |
.128 |
.125 |
.122 |
.119 |
.122 |
.276 |
.242 |
.081 |
|
M4x0.7 |
3.82 |
3.74 |
3.64 |
3.56 |
3.64 |
8.0 |
6.64 |
0.86 |
|
8-32 |
.155 |
.152 |
.148 |
.145 |
.148 |
.328 |
.272 |
.081 |
|
M4.5x0.75 |
4.31 |
4.23 |
4.11 |
4.03 |
4.11 |
9.00 |
7.47 |
0.92 |
|
10-24 |
.177 |
.174 |
.168 |
.165 |
.168 |
.380 |
.315 |
.108 |
|
10-32 |
.182 |
.179 |
.174 |
.171 |
.174 |
.380 |
.315 |
.081 |
|
M5x0.8 |
4.8 |
4.72 |
4.58 |
4.50 |
4.58 |
10.00 |
8.30 |
.098 |
|
12-24 |
.203 |
.200 |
.194 |
.191 |
.194 |
.432 |
.359 |
.108 |
|
M6x1.0 |
5.75 |
5.66 |
5.48 |
5.40 |
5.48 |
12.00 |
9.96 |
1.23 |
|
M6.3x1.0 |
6.05 |
5.97 |
5.78 |
5.70 |
5.78 |
13.00 |
10.46 |
1.23 |
|
1/4-20 |
.235 |
.232 |
.224 |
.221 |
.224 |
.500 |
.415 |
.130 |
|
M7x1.0 |
6.78 |
6.70 |
6.48 |
6.40 |
6.48 |
14.00 |
11.62 |
1.23 |
|
5/16-18 |
.267 |
.294 |
.284 |
.281 |
.284 |
.625 |
.519 |
.144 |
|
M8x1.25 |
7.69 |
7.61 |
7.32 |
7.27 |
7.35 |
16.00 |
13.28 |
1.53 |
|
3/8-16 |
.359 |
.356 |
.343 |
.340 |
.343 |
.750 |
.623 |
.162 |
|
M10x1.5 |
9.64 |
9.56 |
9.22 |
9.14 |
9.22 |
20.00 |
16.60 |
1.84 |
|
7/16-14 |
.419 |
.416 |
.400 |
.397 |
.400 |
.875 |
.726 |
.186 |
|
M12x1.75 |
11.59 |
11.51 |
11.09 |
11.01 |
11.09 |
24.00 |
19.92 |
2.15 |
|
1/2-13 |
.481 |
.478 |
.460 |
.457 |
.460 |
1.00 |
.830 |
.200 |
Torque Tensioning
Screw Point Types
Pilot Hole Sizes
Bolt & Screw Head Types
Weights per Thousand
Unified External Screw Threads
Rod & Bolt Diameters
Metric Conversions
Hole Sizes for Die Casting
Material Strength
Drive Tool Sizes
Hardness Conversions
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