TEC Chiller Project

[zipdogso]

Thanks

With respect, M4 is 4mm major diameter which is 4/25.4 in inches= 0.157, which would make my calculation correct European versus US Screw sizes!!

Geoff

Your probably right But I was under the impression it is not the outside dia of the threads you use but the point of most grip which is the size less the thread which is 3.3mm 0.1 roughly I could well be wrong but I just go by size conversions I have found here and there, Going by the correct definition of "nominal" you right and I an wrong !!


Like I said it's a moot point just tension well so long as you don't crack them.

Incidently have you considered using a thin layer 2 or 3mm max of neoprene between the layers the more you can insulate the hot from the cold the better.

Be interesting to see what Ultrasonic will make of your milled blocks...surprised he hasn't been here yet...