Devon TRF Group Forum

TTR · Powermonger!!

12mm or 14mm nuts with M8x1.25 thread

tugboat · Clubman B

Brian, do you mean 12mm as second choice? And what material? Ally, stainless, mild?

TTR · Powermonger!!

tugboat wrote:
Brian, do you mean 12mm as second choice? And what material? Ally, stainless, mild?

Hi Geoff

They are cylinder head nuts in an awkward spot hence the need for a torque wrench adapter. The original 13mm nuts are steel I guess as they go rusty. Steel replacements would be fine.

I would prefer to go bigger than smaller.

Brian

Bob Adams · Clubman A

Brian, I've bought special nuts from these people recently and as they manufacture in the UK they may be able to help. You can talk to a real person who will understand what you want.

http://www.accuscrews.co.uk/18-hexagon-nuts

tugboat · Clubman B

I searched through all my containers of salvaged stuff last night and can't help but these people I've found very useful for marine grade stainless, so they might be worth a phone call.

http://angliastainless-stanton.co.uk/services

Hope you manage to find what you need.

blueisbest · Novice

M8 x 1.25 is standard metric. They will be readily available in a 13 mm hex 14mm will be a special.

TTR · Powermonger!!

I only just spotted my typo in the original message - now corrected disbelief

To be clear, I am trying to find a source of 14mm (preferably) or 12mm nuts to fit my M8x1.25 studs.

hampsterracing · Devon's Best

http://www.a2stainless.co.uk/M8-Full-Nut-DIN-934-A1-reduced-hex-12mm_ADTI.aspx?nh=2

What is the problem with 13mm hex ones ?

tugboat · Clubman B

I'm puzzled (aka nosey) too. If 12 or 14 would fit, what's the problem with 13?

TTR · Powermonger!!

I bought one of these but it actually has 12mm and 14mm ends and not 12mm and 13mm as it says in the heading

If I can fit a 12m or 14mm nut in place of the original 13mm one then I can use my otherwise wasted investment.

TTR · Powermonger!!

hampsterracing wrote:
http://www.a2stainless.co.uk/M8-Full-Nut-DIN-934-A1-reduced-hex-12mm_ADTI.aspx?nh=2

What is the problem with 13mm hex ones ?

Brilliant - thanks Roger!

The nuts need to be torqued down on the cylinder head studs but its impossible to get a socket on them. The wrench I got only does 12mm and 14mm. Can't find a 13mm torque wrench adapter but its gonna be cheaper to change the nuts wink

tugboat · Clubman B

TTR wrote:
I bought one of these but it actually has 12mm and 14mm ends and not 12mm and 13mm as it says in the heading
If I can fit a 12m or 14mm nut in place of the original 13mm one then I can use my otherwise wasted investment.

If that happened to me, I'd email the seller a pic of the wrong one and suggest they airmail the correct one pronto. Make a claim via Paypal?

grouty · Expert

Brian, give Graham at Astra Building supplies a call. They keep all sorts of weird nuts and bolts.
Clicky Here

TTR · Powermonger!!

I am totally cracking up disbelief

I was replacing a head and started to look for different sized nuts when I realised that the standard nuts are actually 12mm after all and my torque wrench adapter fits biggrin biggrin biggrin

This is where the nuts are situated on the TTR head.

Torque wrench adapter 003.jpg

Interestingly I did the two nuts up first by sense of feel as I always have done in the past and the torque wrench confirmed I was spot on wink

Torque wrench adapter 002.jpg

Sorry to have troubled folk but I am sure the contacts will come in useful another time smile

TTR

tugboat · Clubman B

Thanks for the pics, Brian, I understand now what you were blathering on about. biggrin