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  1. jakieboy

    making of a grade 8 bolt

    To make a grade 8, 1 inch diameter bolt out of 2.875" round bar 4340 ; 1) Should I start out with untreated 2 1/2" round bar and machine down to with 10% of bolt shank dimension, then heat treat to hardness requirements and finish machining shank, than machine the threads, or 2) heat treat the...

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