Thread size questions

[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

[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)

[288gto]

I'll raise you 2/16ths and say that they are Infact 7/16" UNF, the same as the head studs.

Simon

[dal2.0litrefrogeye]

Thanks for advice ....... but I'm going to use no more nails . It's for the alternator bracket , what could go wrong

[cactusman]

I would say 1/2 inch UNF

[johnetype]

And the answer is 7/16th UNF - just in case there was any confusion.

John

[dal2.0litrefrogeye]

Thanks for all help and suggestions.

[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.