Guest diesel_jim Posted April 28, 2008 Share Posted April 28, 2008 I need to get a tap to clean out the thread on my galvanised B pillars for the seatbelt upper mounts. anyone know what the thread is? its quite a fine thread but a big diameter bolt, like 12 or 14mm. thanks! Quote Link to comment Share on other sites More sharing options...
Les Henson Posted April 28, 2008 Share Posted April 28, 2008 I thought they were either M10 or 12 Metric fine Jim, but I'm not 100% sure. Les. 2 Quote Link to comment Share on other sites More sharing options...
Steve 90 Posted April 28, 2008 Share Posted April 28, 2008 Usually 7/16 UNF although some late stuff has started going metric. Quote Link to comment Share on other sites More sharing options...
mmgemini Posted April 28, 2008 Share Posted April 28, 2008 As Steve says. Well mine are mike Quote Link to comment Share on other sites More sharing options...
mike4444244 Posted April 28, 2008 Share Posted April 28, 2008 Yup 7/16 UNF, its only very recently that its changed IIRC Mike Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted April 28, 2008 Share Posted April 28, 2008 7/16 UNF is the seat belt mounting boss thread and the law says you are not allowed to tap them, in the event of damage they have to be replaced Assuming of course that they know Oddly on the vans I used to work on, the lower (reel) mount was M12 x 1.75, upper mounts were M10 x 1.5 and the seat mounting was 7/16 UNF ! You could tap the metric threads but not the imperial ! Mo Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted April 28, 2008 Share Posted April 28, 2008 7/16 UNF is the seat belt mounting boss thread and the law says you are not allowed to tap them, in the event of damage they have to be replaced Assuming of course that they know Oddly on the vans I used to work on, the lower (reel) mount was M12 x 1.75, upper mounts were M10 x 1.5 and the seat mounting was 7/16 UNF ! You could tap the metric threads but not the imperial ! Mo Cheers for that everyone. of course, i'll certainly not be attempting to re-tap the threads in my freshly galvanised (un-weldable thus un-replaceable threaded bits) B pillars. now, on a totally unrelated project i'm doing, i also need a 7/16ths tap anyone got one i can borrow (there are only 2 threads for me to tap, doesn't seem worth buying a tap for that.... hey, 2 threads, thats the same amount as the 2 B pillars, what a co-incidence! ) Quote Link to comment Share on other sites More sharing options...
mike4444244 Posted April 28, 2008 Share Posted April 28, 2008 IF you happened to be worried that the galving process may have softened the mount you could always stick a nut on the back as well, just on the off chance that a tap happpened to get blown by the wind into the hole, and the only way to get it out was to turn it.... Mike Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted July 2, 2008 Share Posted July 2, 2008 Just digging this thread up from the dungeons..... i don't suppose anyone has a 7/16th UNF tap i could borrow for a few minutes do they? Quote Link to comment Share on other sites More sharing options...
Les Henson Posted July 2, 2008 Share Posted July 2, 2008 I might have one Jim. I have a whole box of assorted taps. I'll look tomorrow and text you. Les. Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted July 3, 2008 Share Posted July 3, 2008 I might have one Jim. I have a whole box of assorted taps. I'll look tomorrow and text you.Les. Thanks Les, appreciate that mate. Quote Link to comment Share on other sites More sharing options...
GBMUD Posted July 3, 2008 Share Posted July 3, 2008 I do not know how hard the material you want to clean out of these fictitious holes is Jamie, but you can make your own thread cleaning tap out of an old bolt of the correct size and an angle grinder. I imagine that one could also harden such a home made tap with a blow lamp and a pot of oil... Chris Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted July 3, 2008 Share Posted July 3, 2008 I do not know how hard the material you want to clean out of these fictitious holes is Jamie, but you can make your own thread cleaning tap out of an old bolt of the correct size and an angle grinder. I imagine that one could also harden such a home made tap with a blow lamp and a pot of oil...Chris these non existant holes have been galvanised Chris, so it's not too hard really, but needs something with a decent cutting edge to clear away the muck. Quote Link to comment Share on other sites More sharing options...
Mark Posted July 3, 2008 Share Posted July 3, 2008 Jamie, I have a feeling that I have one, but I will have to check tonight... will let you know if you haven't already found one. Mark Quote Link to comment Share on other sites More sharing options...
freeagent Posted July 3, 2008 Share Posted July 3, 2008 If you don't have any luck by the weekend, PM me and i'll borrow one off my dad for you when I see him Sunday.... Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted July 3, 2008 Share Posted July 3, 2008 Excellent! thanks guys. not heard from Les, although he's more than likely out grafting, so i'll let you (Mark & Freeagent) know later on. Jamie Quote Link to comment Share on other sites More sharing options...
western Posted July 3, 2008 Share Posted July 3, 2008 I'm sure I've read that Richards Chassis clean out the threads & drain holes on their galvanised chassis before sale. Quote Link to comment Share on other sites More sharing options...
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