>Chinese factories seem to have similar tolerance standards.
>"Design for manufacturability" takes on a whole new meaning. :-)

This was always a program with Japanese cameras, when the camera industry in 
Japan was growing in the 50s & 60s. Holes were always tapped so that they 
would take a grub screw that was made to maximum diameter tolerance, and the 
grub screws were made so they would always screw into a hole of minimum size 
tolerance and tapping.

The result was the screws were always sloppy in the hole, and there was 
always a second one to act as a lock screw, and then there would be a touch 
of cement to stop them both falling out ...

My father would always have a pile of screws that seemed to be twice as many 
as there were holes to put them in, when repairing Japanese cameras. 

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