Hi Guys,

I wonder if anyone can explain to me what a C of C actually is?

The reason I ask is because a customer has recently asked us to provide one with a part we have machined. We supplied the C of C for material but they want one for the actual machined product. There is a finishing process the part which we are not carrying out but is on the drawing.

Is it normal to ask for a C of C for a machined part? We are not ISO registered.