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SOCKET CAP,
SHOULDER, AND SET SCREWS
HEX AND SPLINE KEYS (INCH SERIES) |
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ASME B18.3-2003 |
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TABLE 6 DIMENSIONS OF HEXAGON SOCKETS
|
Nominal
Socket
Size |
J |
Nominal
Socket
Size |
J |
Nominal
Socket
Size |
J |
|
Socket Width
Across Flats |
Socket Width
Across Flats |
Socket Width
Across Flats |
|
Max. |
Min. |
Max. |
Min. |
Max. |
Min. |
|
...
...
...
1/16 |
0.028
0.035
0.050
0.062 |
0.0285
0.0355
0.0510
0.0635 |
0.0280
0.0350
0.0500
0.0625 |
3/16
7/32
1/4
5/16 |
0.188
0.219
0.250
0.312 |
0.1900
0.2217
0.2530
0.3160 |
0.1875
0.2187
0.2500
0.3125 |
7/8
1
1-1/4
1-1/2 |
0.875
1.000
1.250
1.50 |
08850
1.0200
1.2750
1.5300 |
0.8750
1.0000
1.2500
1.5000 |
|
5/64
3/32
7/64
1/8 |
0.078
0.094
0.109
0.125 |
0.0791
0.0952
0.1111
0.1270 |
0.0781
0.0937
0.1094
0.1250 |
3/8
7/16
1/2
9/16 |
0.375
0.438
0.500
0.562 |
0.3790
0.4420
0.5050
0.5680 |
0.3750
0.4375
0.5000
0.5625 |
1-3/4
2
2-1/4
2-3/4 |
1.750
2.000
2.250
2.750 |
1.7850
2.0400
2.2950
2.8050 |
1.7500
2.0000
2.2500
2.7500 |
|
9/64
5/32 |
0.141
0.156 |
0.1426
0.1587 |
0.1406
0.1562 |
5/8
3/4 |
0.625
0.750 |
0.6310
0.7570 |
0.6250
0.7500 |
3
... |
3.000
... |
3.0600
... |
3.0000
... |
(For additional
requirements refer to notes below and General Data on page 2.)
GENERAL NOTES:
(a) Sockets up to and including 1 in. nominal size shall be checked in
accordance with the hexagon socket gages and gaging specified in Mandatory
Appendix 1. Suitability of larger sockets shall be determined by means of
direct measurement for various technical and economic reasons.
(b) Dimensions of sockets apply before plating. When plated, see para. 2.1,
Sockets, for gaging. (For plated products, see para. 1.7, Introductory
Notes.)
(c) Broach petals at the bottom of the socket are permissible.
(d) For additional requirements, refer to section 2, General Data, of this
Standard.
NOTES:
(1) Applicable socket depths are specified in the dimensional tables and
notes for the respective screw types.
(2) For broached sockets, the maximum acceptable overcut shall be a size
causing an average 20% flat length reduction in the maximum dimension across
flat hexagon for socket sizes up to and including I in., and 30% for larger
sockets. The maximum overcut on any one of the six flats shall not exceed a
40% reduction in flat length for any size socket.
(3) where hexagon sockets are chamfered, the depth of chamfer shall not
exceed 10% of the nominal socket size for sizes up to and including 1/16
in., and 7.5% for larger sizes. For chamfered sockets, it is permissible for
the NOT GO socket gage to enter to the depth of chamfer as specified in
Mandatory Appendix 1.
Reprinted from ASME B18.3-2003,
by permission of The American Society of Mechanical Engineers. All rights
reserved.
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