Just want to verify my findings are correct. Warmoth only makes one depth 16mm for Fender MIM basses and will not program their CNC to the approx. 14.2mm depth as an option to accommodate an American Standard Precision bass neck.
The neck pocket depths Warmoth uses are Fender specs, but not all Fenders adhere to this. I am not sure where you have 14.2 mm from. You could email the part tech about this, the email is at the bottom of the linked page.