Jim77 wrote: ↑24 Mar 2024, 3:09pm
Hi all
I need to get hold of the following Y6R398050 bolt but it is longer supplied.
https://manualzz.com/doc/53867909/shima ... loded-view
However I have found that it is a m2.5 x 5.2mm bolt and want to buy a subsitute.
However, how do I measure the distance between threads of the “nut” and whether it coarse or fine thread?
Cheers
Jim
Hi Jim, where did you get the 2.5mm diameter figure from ?
The reason I ask is that I've just had a look at a couple of different Shimano shifters with similar though not identical covers and the outer diameter (OD) on both fixing screws is 2.9mm so likely nominal 3mm screws. It's hard for me to get precise measurements for a screw that small, but here's a picture of what I've got for what it's worth.
From the attached photo I count that as 13 threads (over a length of 6.8mm approx)) = .52mm pitch so likely M3 with a .5mm pitch thread would be the one that lines up from looking at the table linked by Jonathan above.
Hoping this helps and doesn't muddy the waters, good luck.
Edit M3, not M5 - altered in text in second paragraph.
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