Internal Thread Inspections

Good Afternoon,

I posted this in manufacturing but figured i would check in here also.

I am wondering if any of you dealt much with mass production of internal threaded parts.

We make a lot of internal threaded parts, thousands per day. We have had many times now where bad threads have been received by our customer. We are looking at a mass inspection method to basically do 100% internal thread checking, but at a mass volume, and I am wondering if anyone here has ever done this. If so, what did you use? What are the inspection speeds? Most of our threads are in the M18 spec line and are single hole parts. .

If anyone would have anything they have seen or used, it would be greatly appreciated. Thank you in advance.