jagnut66 Posted July 31, 2021 Report Share Posted July 31, 2021 Hi, Just a quick question here, in case I have to recut the thread on the stud which secures my spare wheel in position in the well, what is the thread size of Herald wheel nuts? Many thanks, Mike. Link to comment Share on other sites More sharing options...
andybeau Posted July 31, 2021 Report Share Posted July 31, 2021 3/8" UNF is I remember correctly Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 31, 2021 Report Share Posted July 31, 2021 Andy you remember correct all small chassis cars are 3/8" x24 unf wheel studs @ 38/ 42lbft MAX being quite small dia. is so easy for a gorilla to strip them and old tired studs fracture hence many move to 7/16unf ( ie big saloons) or 12mm landrover/ford etc Pete andybeau 1 Link to comment Share on other sites More sharing options...
jagnut66 Posted August 2, 2021 Author Report Share Posted August 2, 2021 On 31/07/2021 at 14:00, Pete Lewis said: wheel studs @ 38/ 42lbft MAX That seems a rather low torque for wheel nuts? Best wishes, Mike. Link to comment Share on other sites More sharing options...
PeteH Posted August 3, 2021 Report Share Posted August 3, 2021 7 hours ago, jagnut66 said: That seems a rather low torque for wheel nuts? Best wishes, Mike. Haynes, Quote exactly the same. 38-42lb/ft. The Thread is 3/8UNF. BTW. I ran a Tap through some yesterday. Checked a couple of Supplier sites, the max recomended is no more than 48Lb/ft, for a Grade 5 Bolt/Nut. Like yourself, when I first saw it I thought it was a low figure. Pete Link to comment Share on other sites More sharing options...
jagnut66 Posted August 3, 2021 Author Report Share Posted August 3, 2021 Fair enough, I would have needed to know this soon anyway, for when I take my wheels off to change the tyres, so it's good (if a little surprising) to know. Best wishes, Mike. Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 3, 2021 Report Share Posted August 3, 2021 10 hours ago, jagnut66 said: That seems a rather low torque for wheel nuts? thats exactly why so many get stripped or shear off completely and why many upgrade to 7/16unf or 12mm studs you wont shear them bear in mind the std torque for a 3/8unf bolt is around 31lbft so you are already on higher grade steel studs and nuts for the 38/42 but any done to a more average 60 will end up on the floor or you loosing a wheel ...not a good experience these design torques are there for a very good reason Pete Link to comment Share on other sites More sharing options...
68vitesse Posted August 3, 2021 Report Share Posted August 3, 2021 Thought I read somewhere that aluminium wheels need a different torque setting to steel. Or am I just dreaming. Regards Paul. Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 3, 2021 Report Share Posted August 3, 2021 i would think alloy may deform if there any fretting going on as its softer? than a steel wheel most with allloys up the stud size so that would allow a higher torque but the stud thread form and nut are the limiting factor as most alloy's have a thicker nave so need a longer stud so they up to the 7/16" or M12 studs then 65lbft is more normal Pete Link to comment Share on other sites More sharing options...
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