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#1 Thread size questions
Posted: Sat Feb 25, 2017 11:52 am
by dal2.0litrefrogeye
Hi all .hands up I'm useless with knowing imperial thread sizes ...... to young
. Anyone know the thread size on a 4.2 block for the alternator bracket . So that's bracket to block the threads in the block ..... I hope that's clear ish
Thanks for any ideas .
Darren
#2 Re: Thread size questions
Posted: Sat Feb 25, 2017 1:20 pm
by JagWaugh
Darren,
Being able to call an imperial fastener by eye is quite handy, and it impresses the crap out of some people.
But in the meantime, have look here:
viewtopic.php?p=63408#p63408
Download the .pdf and keep it in the shop, along with a Vernier and thread pitch gauge.
(I can't remember offhand what the alternator bracket are, but I'd guess 3/8 or 5/16, probably NF)
#3 Re: Thread size questions
Posted: Sat Feb 25, 2017 4:10 pm
by 288gto
I'll raise you 2/16ths and say that they are Infact 7/16" UNF, the same as the head studs.
Simon
#4 Re: Thread size questions
Posted: Sat Feb 25, 2017 6:22 pm
by dal2.0litrefrogeye
Thanks for advice ....... but I'm going to use no more nails . It's for the alternator bracket , what could go wrong
#5 Re: Thread size questions
Posted: Sat Feb 25, 2017 7:20 pm
by cactusman
I would say 1/2 inch UNF
#6 Re: Thread size questions
Posted: Sun Feb 26, 2017 7:54 pm
by johnetype
And the answer is 7/16th UNF - just in case there was any confusion.
John
#7 Re: Thread size questions
Posted: Mon Feb 27, 2017 9:47 pm
by dal2.0litrefrogeye
Thanks for all help and suggestions.
#8 Re: Thread size questions
Posted: Tue Feb 28, 2017 8:12 am
by JagWaugh
In case you didn't know about them, consider getting yourself a thread chaser set. These are great for cleaning up threads, and also make identifying fasteners a doddle. You can get them at any decent tool supply place.
Here is an example:
https://www.summitracing.com/int/parts/ ... /overview/
A thread chart, pitch gauge, and vernier are worth having too.