Like most microscopists I have had 'electronic flash' on my wish list ever since I realized that blur and cilia were synonyms without one.
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To do this I need longer versions of the original screws. Unfortunately I don’t know the screw designation.
I read that with the screw diameter and the number of threads per cm it is possible to identify it.
If anyone knows what it is or can calculate it via the photos below I would appreciate it.
Great project! ... I wish you well.
Metric screws [unlike British and American ones] are specified by pitch
, which is the inverse of 'threads per mm' ... so all you need is the distance between two successive crests. The easiest way to do this is to measure the distance that [say] 10 threads occupy, then divide by 10.
It is important to remember that you are counting from zero! [i.e. counting fence panels, not fence-posts
If the diameter is 2mm and the pitch is 0.4mm then that should be a standard [coarse] M2 thread.http://www.metrication.com/engineering/threads.html
If you are still struggling, please post a more detailed photo, if you can.