TURIN
Yes, but that's only part of the story.
The engineer attempted to obtain the bolts from the manned store in the hangar, and the stores supervisor did indeed query the part number requested (in my experience storemen usually know the correct part numbers for pretty well everything
), but he didn't press the point.
In the event, the bin in the hangar stores contained hardly any of the requested bolts, so the engineer then went to the unmanned AGS carousel under the International Pier at BHX, where he picked up the required quantity after identifying them by comparing the bolts in the bin with those he had removed from the aircraft, resulting in the wrong diameter bolts being (re-)fitted.