On 3/1/2015 6:43 AM, Christopher Tidy wrote:
....
I did wonder if the thread was M4 x 0.8 mm. Apparently this thread exists, but is extremely rare. But I haven't been able to find an M4 x 0.8 mm screw to try out the theory.

Chris


You could turn a short length of M4 x .8 to test. .8 should be a pitch
available on your lathe - it's the standard/coarse M5 pitch.

Bob