BigCol Posted March 4, 2015 Share Posted March 4, 2015 Question a) Anyone know what size the half-thickness-headed bolts for a track day/FIA roll bar are please? (as per http://www.caterhamparts.co.uk/product.php?id_product=420)Question b) Anyone got a tap and die of size (insert answer to the above question here) that I could borrow please?Got the roll bar and the bolts but one thread won't catch, so suspect I need to clean it out (and maybe the bolt too now after repeated efforts) Link to comment Share on other sites More sharing options...
CharlesElliott Posted March 4, 2015 Share Posted March 4, 2015 Metric or imperial?For imperial they are likely to be 7/16". Link to comment Share on other sites More sharing options...
BigCol Posted March 4, 2015 Author Share Posted March 4, 2015 in all honesty, don't know... but assume it to be metric and I bought the bolts as per the link to Caterham's parts website. Link to comment Share on other sites More sharing options...
CharlesElliott Posted March 4, 2015 Share Posted March 4, 2015 What year is the roll bar?If one bolt won't catch - the usual issue is that the hole in the turret within the car is not lining up exactly with the hole in the foot of the roll bar. Have you tried removing the roll bar and running the bolts into it directly to see if they are OK? Link to comment Share on other sites More sharing options...
BigCol Posted March 5, 2015 Author Share Posted March 5, 2015 I ran the bolts into the bar off the car and whilst one was not as easy as the other, they both went in OK. I then put the bar on the car, got one bolt in but couldn't get the other to bite. Have since taken the bar off the car and have exactly the same issue - one is fine, the other isn't.I suspect I exasperated the issue whilst it was on the car and so need to clean it up. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted March 5, 2015 Member Share Posted March 5, 2015 Suggestion here that they're M10.I use this app for unknown nuts and bolts.You're right: sort it, don't force it.Jonathan Link to comment Share on other sites More sharing options...
BigCol Posted March 5, 2015 Author Share Posted March 5, 2015 consensus of opinion is 3/8 UNF thread.does anyone have a 3/8 UNF tap & die (and handles!) I could borrow briefly please? Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted March 5, 2015 Area Representative Share Posted March 5, 2015 If it's a single diagonal imperial roll bar, then I'm with Charles. 7/16ths UNF, or am I just getting confused with the seatbelt bolts? Link to comment Share on other sites More sharing options...
Roger Ford Posted March 5, 2015 Share Posted March 5, 2015 I'm pretty sure I have 3/8, 7/16 and 10mm taps. Will check later. I'm not too far from you. Link to comment Share on other sites More sharing options...
Roger Ford Posted March 5, 2015 Share Posted March 5, 2015 I do indeed have all of those. Let me know if you want to come over and borrow them. I'm here tonight, tomorrow and Saturday morning but will be heading off to Donington Saturday afternoon. Link to comment Share on other sites More sharing options...
BigCol Posted March 5, 2015 Author Share Posted March 5, 2015 Jonathan, I'm not sure I'm working the App correctly; the bolt could be a 9/16" head (correct for 3/8 thread) or 14mm (M10?)The roll bar is one of these: http://caterhamparts.co.uk/product.php?id_product=419; part number 59032URoger, if you could help, that'd be superb! My wife is away with the normal car and the 7 currently has no rear shocks etc on it (as I am I the process of fitting a new roll bar!) Are you around during the day tomorrow, say 2-2:30pm or so? Link to comment Share on other sites More sharing options...
Roger Ford Posted March 5, 2015 Share Posted March 5, 2015 Yup, PM me for details. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted March 6, 2015 Member Share Posted March 6, 2015 Do you need any more on identifying the bolt or thread... or is it sorted?Jonathan Link to comment Share on other sites More sharing options...
BigCol Posted March 6, 2015 Author Share Posted March 6, 2015 still not entirely sure of the size (didn't really get to grips with the app)... that said, majority of replies is that it is a 3/8 UNF, so intend to work on the basisif my schedule hadn't slipped, I would have been able to borrow the taps and dies from Roger and they should've helped me to confirm... fingers crossed, will be able to get them on Monday. Link to comment Share on other sites More sharing options...
F355GTS Posted March 7, 2015 Share Posted March 7, 2015 Phoen Arch motors on Monday, they'll confirm the thread Link to comment Share on other sites More sharing options...
BigCol Posted March 7, 2015 Author Share Posted March 7, 2015 am embarrassed that I didn't even consider asking anyone involved in its manufacture! the roll bar has Caged stickers on it... reckon they'd know! Link to comment Share on other sites More sharing options...
BigCol Posted March 9, 2015 Author Share Posted March 9, 2015 nice chap at Caged said its either M10 or 3/8" nice chap in Twickenham (Roger Ford) has lent me both metric and Imperial taps and dies and the 3/8 cleaned out the dodgy email thread perfectly; both bolts run into both stumps nicely now! Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted March 9, 2015 Member Share Posted March 9, 2015 ... and the 3/8 cleaned out the dodgy email thread perfectly...:-)Jonathan Link to comment Share on other sites More sharing options...
BigCol Posted March 9, 2015 Author Share Posted March 9, 2015 an adjustment by my iPad's presumptive text... is it more sophisticated and perceptive than we realise? Link to comment Share on other sites More sharing options...
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