The supplied adapter isn't the one we approved

The suffix is on the seller's package sticker. The arm's own identifier matches our order. The adapter has a different item label from the approved drawing.

Then frame the immediate question around that adapter item. Ask for its applicable drawing and the reason for substitution. No need to diagnose an arm variant from a packing sticker.

I've corrected my ticket to say supplied adapter mismatch. They replied that it is equivalent but haven't provided a dimensional comparison.

Ask them to address the actual locating feature and your tool drawing, including the resulting tool position. Even an adapter that bolts on can change the setup assumptions. Whoever integrates it needs an agreed configuration, not a general assurance.

And do not machine your tool to accommodate it while the supplied configuration remains disputed. That would make the eventual comparison rather less straightforward.

Have you measured the difference, or only compared photographs?

A qualified dimensional check could clarify it, with the components unfitted. Photographs identify the concern; they are not a substitute for the interface dimensions.

Keep each adapter label visible in the measurement record. We once measured the returned sample beautifully and then attached the results to the replacement's paperwork.

Good warning. Pair the measurements with the actual item identifier and approved drawing revision so the seller can answer the specific mismatch.

Our toolroom confirmed a locating-feature difference against the approved drawing. Purchasing has requested the originally agreed adapter. The seller is reviewing it; no replacement or equivalence assessment is confirmed yet.