Nuts

[benjenbav]

I need a nut with an odd thread. It's 8mm and its partner appears to be stamped "H8". It's not a regular M8 and searching for H8 nuts or even H8 bolts hasn't so far produced the goods.

Any ideas gratefully received.

 

[benjenbav]

PS I expect the politically correct term is "hexagonal fastener"

 

[colingr]

Could be hexagonal though

 

[benjenbav]

Booger! I thought I'd edited that fast enough.

 

[colingr]

You've got to be quick round here

 

[benjenbav]

Any idea about the nut?

 

[GrahamHR]

If it's not the standard M8 x 1.25 coarse thread , then it could be the fine M8 thread, which is M8 x 1.0.

Graham

 

[jfm]

H8 is nothing to do with dimensions. It's a tensile strength indicator. It's the most common grade of high tensile, in fact (it's not stainless, btw)

If an M8 nut wont fit then it could either be M8 fine or super fine (which you can tell just by looking; they are both quite rare in practice though) or it's an imperial that is close to M8 eg 3/8UNF

 

[benjenbav]

Thanks. I think it's probably the metric fine thread.

Actually it's a bit fraudulent putting the question on here: it's for a lawnmower (Mountfield) where the arms are connected to the mower by a captive bolt on either side (which is what I am trying to match) which certainly has a finer thread than the standard M8 bolt which is used further up each of the same arms.

 

[sarabande]

I need a nut with an odd thread. ...
Any ideas gratefully received.

err, have you tried searching for cycling threads ?

 

[rafiki_]

I'm amazed it's not Imperial on a Mountfield?

 

[Csail]

H8 is nothing to do with dimensions. It's a tensile strength indicator. It's the most common grade of high tensile, in fact (it's not stainless, btw)

If an M8 nut wont fit then it could either be M8 fine or super fine (which you can tell just by looking; they are both quite rare in practice though) or it's an imperial that is close to M8 eg 3/8UNF

+1

 

[colhel]

H8 is nothing to do with dimensions. It's a tensile strength indicator. It's the most common grade of high tensile, in fact (it's not stainless, btw)

If an M8 nut wont fit then it could either be M8 fine or super fine (which you can tell just by looking; they are both quite rare in practice though) or it's an imperial that is close to M8 eg 3/8UNF

Sorry Sir I have to correct you (doff cap) . 3/8 is 9.5mm what he he may need is 5/16 if it should be imperial.
If the OP wishes to PM me I'll be able to help as I have quite a selection of odd taps.

 

[jfm]

Sorry Sir I have to correct you (doff cap) . 3/8 is 9.5mm what he he may need is 5/16 if it should be imperial.
If the OP wishes to PM me I'll be able to help as I have quite a selection of odd taps.

FFS! I clearly said it would be something NEAR to 8mm, but not any particular thing. That's what the "eg" means. Sure, it could be 5/15, or 3/8, or something else that isn't UNF or UNC but still near to 8mm

And WTF does he want a tap? To make his own nut, when he can buy one on line for 50p?

 

[colhel]

Sorry.

 

[tico]

As its a Mountfield, i think it's made or at least designed by our friends! over the pond..... Hence likely to be a 5/16" UNC

 

[Kawasaki]

This thread it needs no more thread drift
Nuts to all Mountfields
I got one given
My lad was using it an said it was getting hot
I said its cos of the nut behind the wheel
He didn't click wot I had said
He attempted a repair to said hot mower
He stripped a thread!!!
I kid you not tiss true as I sit here typing this rollocks!!
He also has knackered me strimmer
Sorry fred dwift!!

 

[Cymrogwyllt]

and just why is fred adrift?

 

[Kawasaki]

and just why is fred adrift?

Stripped his nuts I reckon

 

[benjenbav]

Stripped his nuts I reckon

Ooh err missus.

Thanks for all the help, everyone. The bolts further up the handles/arms are definitely M8. But it wouldn't surprise me a bit if the one I want isn't imperial. I will check further.