Make them ! Its the only way if you want to get the old hex sizes right.
Mcreadys still have the old hex sizes of steel bar in stock in quite a few specs.
The OLD sizes are as follows
W Size Bar AF size
3/8" 0.710"
7/16" 0.820"
1/2" 0.920"
9/16" 1.010"
5/8" 1.100"
3/4" 1.300"
7/8" 1.480"
1.00" 1.670"
If you have a lathe this is an easy, but slightly boring job ! I tap under power and have use of a die box for the bolts and studs. Also, buy a tipped part off tool (the blade in block type). You will rip through hex bar in seconds when parting off.
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