Help with MIL-DTL-14072

Hello,


I am wondering if anyone has had any experience with the MIL spec MIL-DTL-14072, as it is the first time I am encountering this specification callout.

I am currently creating a first article inspection report for one of our customers in the Aerospace Industry. On their source controlled drawing, they call out "FINISH: SHALL BE IN ACCORDANCE WITH MIL-F-14072". However, they specify no type or class of finish. The SCD was released and has not been revised since 1971.

Is there a default class/type of finish specified in the document somewhere? For example, for MIL-DTL-5541, there is a "default" finish type and class if nothing is specified on the drawing, but I cannot seem to find a default type and finish in the MIL-DTL-14072 specification.

My other thought is that the SCD needs an update to callout a finish number, perhaps nobody has noticed this inconsistency, as this is the first FAI that is being performed on this part. We have been selling this part for over 20 years, and there has not been an issue with the finish as far as I am aware.

Please let me know your thoughts if anyone with more experience in this area happens to run across this thread. Thank you so much for any comments or thoughts.

Welcome to The Cove!

What kind of metal are you finishing?
What kind of parts: assemblies, simple brackets, something else?
What type of finish are you applying? Paint? If yes, what kind of paint?
From Section 1.3, are your finished surfaces to be Type I or II?

I agree your customer really should be calling out a finish number, so you can find your way in the Tables. There is nothing (no "P" or "M" callout) on the drawing?

I have come across something similar to this before. This is basically the document telling you where to pick your specification from based on the end users requirement. There is a DEF STAN which is basically the same we have customers send us PO's asking us to work to this DEF STAN we just send them back as say ok we do those finishes but which one do you actually want. If youve been doing this part for 20 years does your initial contract review no call the finish out based on a spec from this table? Based on that though the spec was up reved 10 years ago so is your initial choice and determination of finish based on the E or D revisions, sometimes the older revisions have a more limited scope.

Thank you both for your responses and insight! There is no callout on the customer SCD that details any specific type of finish, only that the finish shall be in accordance with the MIL spec.

The initial contract review also does not call out any specific finish for the part, only to refer to the customer SCD (that doesn't state a specific finish).

Checking older revisions of the spec is a good idea, as the original callout was for MIL-F-14072. Perhaps that revision will have a more applicable description to my current issue. I think Mattador is also correct in which my company should be able to choose a finish type that complies with MIL-DTL-14072, which was chosen years ago when this part was originally fabricated. The design was approved by the customer as well. I was only asking the question as now I have to "prove it" with the first article inspection report.

I will check the older revisions first, and if that does not work, I will check for a finish type that we are compliant to for this part and use that to prove compliance to the MIL spec.

Thank you both very much for your time and insight!