UPDATE: Reviews section refreshed, redesigned, searchable: Go take a look
I had to take mech apart and rebuild after a branch incident and completely removed the B Screw. It sits in a small plastic housing,called a 'plate' [url= http://si.shimano.com/php/download.php?file=pdf/ev/EV-RD-M786-3321.pdf&bcsi_scan_AB11CAA0E2721250=ZHt7pwqRMt6m+92c0y8ocj5iNhwmAAAArHiZOw==:1 ]part 10 on here[/url] which wont go back in as flush as it came out. Looks like its just a guide anyway ? Seems to be working ok but the tiny guide 'plate' is a bit mangled.
so my question is/was, is this just a wee guide to stop the screw either cross threading at beginning/undoing while in use ?
Thanks
basically he same as nylok nut, stops the bolt unscrewing. You can use threadlock if it won't go back
excellent, thanks daver27
