Machinery's Handbook, 31st Edition
1818
SOCKET HEAD SHOULDER SCREWS Table 8. American National Standard Hexagon Socket Head Shoulder Screws ANSI/ASME B18.3-2012 H L ±.005 E F R I M This diam. not to exceed major diam. of thread S A D P J 32 G K N D 1
Head Side Height Min.
Shoulder Diameter
Head Diameter
Head Height
Nominal Thread Size
Thread Length
Max.
Min.
Max.
Min.
Max.
Min.
Nominal Size
E
D
A
H
S
D 1
0.2480 0.2460 0.375 0.357 0.188 0.177 0.157 0.3105 0.3085 0.438 0.419 0.219 0.209 0.183 0.3730 0.3710 0.562 0.543 0.250 0.240 0.209 0.4980 0.4960 0.750 0.729 0.312 0.302 0.262 0.6230 0.6210 0.875 0.853 0.375 0.365 0.315 0.7480 0.7460 1.000 0.977 0.500 0.490 0.421 0.9980 0.9960 1.312 1.287 0.625 0.610 0.527 1.2480 1.2460 1.750 1.723 0.750 0.735 0.633 1.4980 1.4960 2.125 2.095 1.000 0.980 0.842 1.7480 1.7460 2.375 2.345 1.125 1.105 0.948 1.9980 1.9960 2.750 2.720 1.250 1.230 1.054
10-24 1 ∕ 4 -20 5 ∕ 16 -18 3 ∕ 8 -16 1 ∕ 2 -13 5 ∕ 8 -11 3 ∕ 4 -10 7 ∕ 8 -9 1 1 ∕ 8 -7 1 1 ∕ 4 -7 1 1 ∕ 2 -6
0.375 0.438 0.500 0.625 0.750 0.875 1.000 1.125 1.500 1.750 2.000
1 ∕ 4
5 ∕ 16
3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4
1
1 1 ∕ 4 1 1 ∕ 2 1 3 ∕ 4
2
Thread Neck Width
Shoulder Neck Dia.
Shoulder Neck Width
Head Fillet Extension Above D
Hexagon Socket Size
Thread Neck Diameter
Thread Neck Fillet
Max.
Min.
Max.
Min.
Max.
Max.
Min.
Max.
Nom.
Nominal Size
G
I
K
F
N
M
J
0.142 0.133 0.083 0.227 0.093 0.023 0.017 0.193 0.182 0.100 0.289 0.093 0.028 0.022 0.304 0.291 0.125 0.477 0.093 0.035 0.029 0.414 0.397 0.154 0.602 0.093 0.042 0.036 0.521 0.502 0.182 0.727 0.093 0.051 0.045 0.638 0.616 0.200 0.977 0.125 0.055 0.049 0.249 0.237 0.111 0.352 0.093 0.031 0.025 0.750 0.726 0.222 1.227 0.125 0.062 0.056 0.964 0.934 0.286 1.478 0.125 0.072 0.066 1.089 1.059 0.286 1.728 0.125 0.072 0.066 1.307 1.277 0.333 1.978 0.125 0.102 0.096
0.014 0.017 0.020 0.026 0.032 0.039 0.050 0.060 0.070 0.080 0.090
1 ∕ 4
1 ∕ 8
5 ∕ 32 3 ∕ 16
5 ∕ 16
3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4
1 ∕ 4
5 ∕ 16
3 ∕ 8 1 ∕ 2 5 ∕ 8 7 ∕ 8
1
1 1 ∕ 4 1 1 ∕ 2 1 3 ∕ 4
1
2
1 1 ∕ 4 All dimensions are in inches. The shoulder is the enlarged, unthreaded portion of the screw. Stan dard length increments for shoulder screws are: 1 ∕ 8 inch for nominal screw lengths of 1 ∕ 4 through 3 ∕ 4 inch; 1 ∕ 4 inch for lengths above 3 ∕ 4 through 5 inches; and 1 ∕ 2 inch for lengths over 5 inches. The thread conforms to the Unified Standard Class 3A, UNC. Hexagon socket sizes for the respective shoulder screw sizes are the same as for set screws of the same nominal size (see Table 7 ) except for shoulder screw size 1 inch, socket size is 1 ∕ 2 inch, for screw size 1 1 ∕ 2 inches, socket size is 7 ∕ 8 inch, and for screw size 2 inches, socket size is 1 1 ∕ 4 inches. For details not shown, including materials, see ANSI/ASME B18.3-2012.
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