Helicoil STI threads

[Fueler]

Anyone have a template for tapping a hole for a 1/2-13 Helicoil?  I use a single point thread mill. 

Thought I might ask before going down that rabbit hole and screw it up more than once before success. 😎

[seth.madore]

How are you planning on validating the fit, a gage or similar?

It cuts just like a regular thread, just oversized. You'll have to know the minor/major values, which you should be able to get from the thread spec