Grammar correction please

Thanks for your study & confirmation on the thread pitch. Now it's clear that the pitches of the internal threads are standard.

I would like to be clearer on this topic as tomorrow Pranesh and I will be visiting Tafe for physical study of the pitch (We are going to carry M3, M3.5 and M4 bolts with standard pitch to make sure that the pitches are standard and also to make the customer understand)

If I am correct, Tafe did not give us the drawings for the parts PL20067,69,70,71 and 72. They gave us the description of the parts along with the catalog of Penn engineering and the samples. It was us, who prepared the drawings, sent to Tafe and got approval. I would like to understand on what basis we defined the thread pitch? Your clarification on this point would help me to answer them in case if they ask this question to me.