Mutual Screw Machine Screws Head Dimensions Chart

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100º Flat
Machine
Screws
Head Dimensions
Combo Truss
Slotted5
Phillips
F
H
100°
M
S
lat
ead
For
acHine
crewS
ASME B18.6.3-2002
A
H
J
T
M
R
N
F
G
Head Dimensions
Slot Dimensions
Recess Dimensions
Nominal
Protrusion Above
Phillips
Gaging
Size
Gaging Diameter
Driver Size
Diameter
Height
Width
Depth
Diam.
Depth
Width
Diameter
Max
Min
Max
Min
Max
Min
Max
Min
Ref
Ref
Ref
Max
Min
0
.112
.095
.026
.019
.023
.016
.013
.008
.054
.027
.013
.020
.012
.074
0
2
.162
.142
.037
.029
.031
.023
.019
.012
.088
.048
.012
.022
.014
.121
1
4
.212
.188
.049
.039
.039
.031
.024
.017
.110
.070
.018
.025
.016
.167
1
6
.262
.235
.060
.049
.048
.039
.030
.022
.148
.074
.027
.028
.017
.214
2
8
.312
.282
.072
.060
.054
.045
.036
.027
.162
.090
.028
.031
.019
.261
2
10
.362
.329
.083
.070
.060
.050
.042
.031
.178
.104
.030
.034
.021
.307
2
12
.438
.375
.095
.080
-
-
.050
.039
-
-
-
.037
.023
-
3
1/4
.477
.437
.110
.094
.075
.064
.055
.042
.240
.124
.033
.040
.025
.415
3
5/16
.597
.550
.138
.118
.084
.072
.069
.053
.310
.157
.053
.047
.030
.526
4
A
A
M
J
N
H
G
J
M
T
Slotted5
Phillips
N
c
d
t
H
M
S
ASME B
oMbination
rive
ruSS
eadS For
acHine
crewS
18.6.3-2002
A
H
J
T
M
G
N
Recess Penetration
Dimensions of Recess
Gaging Depth
Nominal
Phillips
Head Diameter
Height of Head
Width of Slot
Depth of Slot
Size
Driver Size
Diameter
Depth
Width
Max
Min
Max
Min
Max
Min
Max
Min
Ref
Ref
Ref
Max
Min
4
.257
.241
.069
.059
.039
.031
.040
.027
.105
.060
.018
.062
.044
1
6
.321
.303
.086
.074
.048
.039
.050
.033
.151
.071
.027
.073
.048
2
8
.384
.364
.102
.088
.054
.045
.058
.040
.166
.086
.029
.088
.063
2
10
.448
.425
.128
.113
.060
.050
.068
.048
.181
.102
.030
.104
.079
2
12
.511
.487
.134
.118
.067
.056
.077
.055
.241
.115
.032
.111
.086
3
1/4
.573
.546
.150
.133
.075
.064
.087
.063
.256
.130
.033
.126
.101
3
65
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