Machinery's Handbook, 31st Edition
Metric Socket Head Shoulder Screws
1719
Table 6a. Hexagon Socket Head Shoulder Screws - Metric Series ANSI/ASME B18.3.3M-1986 (Withdrawn)
F
A
H L ± 0.125
E
S
Y 0.8
Z
Detail Y
M
I
R 1
D 1
G This Dia. Not to Exceed Major Dia. of Threads
K
N
J
D
P
Detail Z
Shoulder Diameter a , D
Head Diameter, A
Chamfer or Radius , S Nominal Thread Size, D 1 Max.
Thread Length, E
Head Height , H
Nominal Shoulder, Dia.
Max.
Min.
Max.
Min. 9.78 12.73 15.73 17.73 23.67 29.67 35.61 Min. 5.92 7.42 9.42 12.42 15.42 19.42 14.42
Max.
Min. 4.32 5.32 6.78 8.78 10.73 13.73 15.73 Max. 0.66 0.69 0.80 0.93 1.03 1.30 1.46
Max. 9.75 11.25 13.25 16.40 18.40 22.40 27.40
6.5 8.0 10.0 13.0 16.0 20.0 25.0
6.487 6.451 10.00 7.987 7.951 13.00 9.987 9.951 16.00 12.984 12.941 18.00 15.984 15.941 24.00 19.980 19.928 30.00 24.980 24.928 36.00
4.50 5.50 7.00 9.00 11.00 14.00 16.00
0.6 0.8 1.0 1.2 1.6 2.0 2.4
M5 × 0.8 M6 × 1 M8 × 1.25 M10 × 1.5 M12 × 1.75 M16 × 2 M20 × 2.5 Head Fillet Extension above D, M
Thread Neck Width , I
Shoulder Neck Width , F
Shoulder Neck Dia, K
Thread Neck Fillet , N
Thread Neck Dia., G 3.86 3.68 4.58 4.40 6.25 6.03 7.91 7.69 9.57 9.35 13.23 12.96 16.57 16.30 Max. Min.
Nominal Shoulder Diameter
Hexagon Socket Size, J
Max.
Max.
Min. 0.50 0.53 0.64 0.77 0.87 1.14 1.30
Max. 7.5 9.2 11.2 15.2 18.2 22.4 27.4
6.5 8.0 10.0 13.0 16.0 20.0 25.0
2.4 2.6 2.8 3.0 4.0 4.8 5.6
2.5 2.5 2.5 2.5 2.5 2.5 3.0
3 4 5 6 8
10 12
a The shoulder is the enlarged, unthreaded portion of the screw.
Table 6b. Standard Sizes and Socket Dimensions ANSI/ASME B18.3.3M-1986 (Withdrawn) Standard Sizes for Government Use
Dimensions Hexagon Sockets - Metric
Socket Width Across Flats J
Nominal Shoulder Diameter
6.5
8
10
13
16
20
25
Max.
Min.
Min. 3.44 4.58 5.72 6.86 9.15
10.0 065010 080010 100010
3 4 5 6 8
3.071 3.020 4.084 4.020 5.084 5.020 6.095 6.020 8.115 8.025
12.0 16.0 20.0 25.0 30.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0 120.0
130012
10 12
10.127 10.025 11.50 12.146 12.032 13.80
160030
40.0 065040
200040
Range of standard diameter and length combinations and their part numbers. (PIN)
080050
250050
100100
130120 160120 200120 250120
All dimensions are in millimeters. R 1 rounded or chamfered: R 1 ≤ 0.15 mm for M5, M6, M10; R 1 ≤ 0.20 mm for M12, M16, M20 Unless specified otherwise, threads are metric coarse series in accordance with ANSI/ASME B1.13M, Metric Screw Threads - M Profile. Tolerances for threads are to ISO Tolerance Class 4g6g. Standard length and diameter combinations are shown in the lower chart. The government encourages the general use of the part number system (PIN) to achieve maximum parts standardization. For details not shown, including material and complete PIN system, see ANSI/ASME B18.3.3M-1986 (Withdrawn).
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