What Are You Doing To/With Your Car Today?

How did you tap the insides of those bolts?

The Castle nut gave me enough threads to hold the inserts and thread onto the end of the bolt.
I bored into the bolt end just far enough for the 'starter' part of the tap to occupy, so that I can get complete threads in the insert.
The end of the bolt is 'squared' so that the insert is held 'square'. I just thread the insert into the nut and lightly 'bind' it in place. Then I just clamped it in the mill vise and used the mill chuck to start the tap accurately, and we're off and running!

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