Monkey_matt Posted November 1, 2011 Report Share Posted November 1, 2011 Is there any easy way of working out what size screw I need for a certain hole? (The innuendo in that sentence! lol) Reason is, mounting the headunit to the 7, now the brackets are attached securely to the head unit, however at the moment, the brackets are not screwed to the car :s so the unit is kinda loose. I dont have the screws needed to attach it however. Is there anyway of working out which size I need without trial and error? or does anyone know what size screws I need? Link to comment Share on other sites More sharing options...
planc Posted November 1, 2011 Report Share Posted November 1, 2011 I can send you some tomorrow if you want, send me a PM regarding your address. Link to comment Share on other sites More sharing options...
Monkey_matt Posted November 1, 2011 Author Report Share Posted November 1, 2011 Ahh cheers, PM sent Link to comment Share on other sites More sharing options...
yellowchinaman Posted November 1, 2011 Report Share Posted November 1, 2011 M6 = 6mm hole M7 = 7mm hole etc... does that answer your question? Link to comment Share on other sites More sharing options...
KrisSilver Posted November 1, 2011 Report Share Posted November 1, 2011 (edited) It's not the size that counts... Someone was gona... Edited November 1, 2011 by KrisSilver Link to comment Share on other sites More sharing options...
planc Posted November 2, 2011 Report Share Posted November 2, 2011 Bolts in the post bud, any problems give me a shout. Link to comment Share on other sites More sharing options...
cooperman Posted November 2, 2011 Report Share Posted November 2, 2011 M6 = 6mm hole M7 = 7mm hole etc... does that answer your question? have to say you are wrong on that one. M6 will be 5mm hole size M7 will be 6mm hole size this is not a equal for all, as M10 is 8.5mm and M5 is 4.2mm. (all sizes are approx.) M7 does equal a 7mm bolt diameter though. just so people know. Link to comment Share on other sites More sharing options...
Ghoulie Posted November 2, 2011 Report Share Posted November 2, 2011 Im really glad somebody asked this coz for some strange reason I keep losing bolts into thin air that are fitted Link to comment Share on other sites More sharing options...
Insanity-74 Posted November 2, 2011 Report Share Posted November 2, 2011 have to say you are wrong on that one. M6 will be 5mm hole size M7 will be 6mm hole size this is not a equal for all, as M10 is 8.5mm and M5 is 4.2mm. (all sizes are approx.) M7 does equal a 7mm bolt diameter though. just so people know. Yep...Its all to do with major diameters and minor diameters. You also have to take into consideration the thread pitch as Toyota thread sizes arnt always a standard metric pitch. theres a mix of metric course & metric fine. Major diameter on a bolt is the peak of the threads, the minor being the troughs....a bolt hole when drilling a hole to suit, needs to match the minor diameter or there would be nowhere for the thread to go. For things like the under trays, there are some self tapping bolts used which from the dealers are quite expensive, I picked up a bag of 200 self tapping bolts the same as Toyota for about £5 from an auto jumble, the thread pitch on these isnt critical as they will cut there own thread, (They usually bolt into a plastic but they do need to be the right diameter so they have enough grip...too small and they will drop out, too big and they split the thing they are tapping in to. Link to comment Share on other sites More sharing options...
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