The engineer on the wrench project wanted to use a wrench that had a part number and was readily available from McMaster Carr because we can get it delivered overnight for standard shipping. Unfortunately the Armstrong version of the ratcheting box wrench that McMaster Carr stocked didn’t have a stop on it so the hex would pass right through it. To solve the problem I drilled a 3/32” hole thru the hex using a solid carbide drill because the hex is hardened. I was surprised when I pressed a 3/32” spring pin into the hole because the hardened hex key shaved the OD spring pin as you can see. For the second longer hex I drilled a 1/8” hole and glued in a 3mm dowel using Loctite 680. This resulted in a neater job.
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