HEX SOCKET KEYS
LONG ARM SERIES
All Dimensions in Inches
Hexagon Width
Across Flats
Length of
 Long Arm
Length of
 Short Arm
Min. Torsional
Shear Strength
Min. Torsional
Yield
Max. Min. lb. in lb. in
.028 .0275 2.594 .219 1.2 1.1
.035 .0345 2.672 .344 2.4 2.1
.050 .049 2.844 .531 7 6
1/16 .0615 3.000 .562 12 11
5/64 .0771 3.188 .609 26 23
3/32 .0927 3.375 .656 46 40
7/64 .1077 3.562 .703 73 63
1/8 .1235 3.750 .750 108 94
9/64 .1391 3.937 .796 154 134
5/32 .1547 4.125 .844 210 183
3/16 .1860 4.500 .938 364 317
7/32 .2172 4.875 1.031 580 502
1/4 .2480 5.250 1.125 860 750
5/16 .3110 6.000 1.250 1685 1465
3/8 .3730 6.750 1.375 2900 2520
7/16 .4355 7.500 1.500 4400 3860
1/2 .4975 8.250 1.625 6600 5750
9/16 .5600 9.000 1.750 9200 8000
5/8 .6225 9.750 1.875 12650 11000
3/4 .7470 11.250 2.125 20800 18100
7/8 .8720 12.750 2.375 29200 25400
1 .9970 14.250 2.625 43700 38000
1-1/4 1.243 N/A 3.000 71900 62500
1-1/2 1.493 N/A 3.500 124000 108000
1-3/4 1.743 N/A 4.000 198000 172000
2 1.993 N/A 4.500 276000 240000