– Nevertheless some flanges have gr

– Nevertheless some flanges have groove much more than 2,3mm. Please control it more carefully. Your way theoretically right, but many depends from hands which made measurement. if instrument will not exactly straight, it will show less

2. for control ANY thread, necessary 2 gauge. GO and NOT GO. If thread between these 2 gauges – it is OK.

if you use only 1 gauge, you can make thread weak and not notice it. Please check by NOT GO thread, if you can screw it – it mean that thread are weak

3. -OK

4. Again, accuracy which we require, very difficult to measure by hand instrument. You need to use table and indicator ( like you use for measure pillars)

5. Difference in our and your measurements – Possible our method not ideal, but when we use carefully made pillars and make measurement carefully, we after measurement same flanges several time, have accuracy below 0,05mm.

I do not know how you can reach same accuracy, you can use same method or made another, but :

You promised me distance between hole axis and surface D46 7,5 +/- 0,2mm. OK, together with measurement accuracy +/-0,3mm

Not more.

You should keep this accuracy, and of course you should be able to measure this distance with good accuracy. Otherwise you do not know what you are supply me.

So –please make me flanges with good accuracy and control it. After I have got samples without mistakes, I will be able to order lotDmitry