MIL Spec Revisions

[fsincox]

Guys,
Is there a statement somewhere that says: "use the latest MIL spec revision if there is no revision specification otherwise" unlike the Tolerancing standard where revision is specifically specified???
Thanks,
Frank

 

[ctopher]

Use the revision on the MIL spec document. Sometimes the contract from the customer will specify which revision.
I would not use a note indicating to use the latest revision, a vendor may not have the latest, but assume they do.

Chris
SolidWorks 10 SP4.0
ctopher's home
SolidWorks Legion

 

[MintJulep]

Is there a statement somewhere? Sure, you just wrote it.

Problem is, what you wrote is a moving target, as standards might get revised over the duration of a long project.

The standard that is the latest rev at the time of Notice to Proceed, or contract execution is commonly used.

 

[sbozy25]

Unfortunately in my experience, MIL specs are typically very out-dated, and take for ever to have new revisions written. I deal with them on a daily basis, and unless it refers to the type of CARC paint, I usually default to an SAE spec and call it out as being used. Most of the new MIL specs say to use the SAE version anyway, so why not.

Cabbages, knickers, It hasn't got A BEAK!

 

[tloutzen]

Typically if a MIL-STD (Military Standard) is called out on a drawing, and later it is cancelled, you are not necessarily required to go back and change the standard or spec to the latest or superseding standard/spec. The reason being is that usually when a MIL-STD is canceled, there is a superseding standard or spec listed on the cancelled MIL-STD, so it is typically understood that the superseding standard or spec is used. If there is no superseding spec, you would still need to apply the requirements of the MIL-STD, since this is a contract requirement.
You need to be careful, as in some instances you might have old contracts that still call out MIL-STD-100, for example; you technically can't go in and change it to read ASME Y14.100-2004 until the contract is changed by the controlling contract administrator to show this. Generally, there is no technical problem if you would change MIL-STD-100 to ASME Y14.100 - with the exception of Specification Control Drawings. Specification Control Drawings are now no longer used, and are now referred to as Vendor Item Control Drawings. It probably would not matter to most of your customers, since Vendor Item Control Drawings are commonly used today, but it could be stated in an audit that you didn’t follow the contract stated standards exactly.

 

[ptruitt]

There might be a few companies that would benefit by converting MIL-Specs to internal specifications. After all, our tax dollars went to writing them. Those companies could then control revisions and not need to worry about them disappearing or changing without their knowledge. I realize that not many folks are in a position to do that, but it might be good for some to have that control and minimize writing custom specs or feel pressured to buy the latest, costly, copyrighted specs. If you do that, I would strongly advise establishing an entirely different numbering system in order to minimize any confusion due to similar, but different specs.

Peter Truitt