I need 240mm M8 coach bolts (or roofing bolts). These do not seem to be
available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Any other ideas? These to join concrete uprights of sectional building.

On Friday, June 4, 2021 at 1:09:20 PM UTC+1, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to be
available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Any other ideas? These to join concrete uprights of sectional building.
Doming it should not be too much of a problem torch or gas welding equipment and something you can use as an anvil, making the squared bit will require set and dolly. If all you want is a head then welding a nut on the end of the studding is probably the easiest solution.

Richard

On Fri, 4 Jun 2021 05:18:54 -0700 (PDT), Tricky Dicky
wrote:

On Friday, June 4, 2021 at 1:09:20 PM UTC+1, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to be
available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Any other ideas? These to join concrete uprights of sectional building.
Doming it should not be too much of a problem torch or gas welding equipment and something you can use as an anvil, making the squared bit will require set and dolly. If all you want is a head then welding a nut on the end of the studding is probably the easiest solution.

Or, depending on the diameter of the hole, join some studding to cheap
/ std coach bolts with some 'stud connectors' (locked up with a hard
locking compound if necessary)?

https://www.screwfix.com/p/easyfix-c...-10-pack/373gx

Apparently Crispy Bacon doesn't want my advice because I'm a ******.
;-)

Cheers, T i m

On 04/06/2021 14:09, T i m wrote:
On Fri, 4 Jun 2021 05:18:54 -0700 (PDT), Tricky Dicky
wrote:

On Friday, June 4, 2021 at 1:09:20 PM UTC+1, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to be
available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Any other ideas? These to join concrete uprights of sectional building.
Doming it should not be too much of a problem torch or gas welding equipment and something you can use as an anvil, making the squared bit will require set and dolly. If all you want is a head then welding a nut on the end of the studding is probably the easiest solution.

Or, depending on the diameter of the hole, join some studding to cheap
/ std coach bolts with some 'stud connectors' (locked up with a hard
locking compound if necessary)?

https://www.screwfix.com/p/easyfix-c...-10-pack/373gx

I don't see how that is helpful. Perhaps Chris can advise.

If those connecting nuts could enter the hole, then I'm sure the OP
could have used larger diameter coach screws. Even ToolSatan has M12 x
240m coach bolts

Apparently Crispy Bacon doesn't want my advice because I'm a ******.
;-)

You are, but since you've tried I thought I would reply so he could see
your 'advice'.

On 04/06/2021 13:18, Tricky Dicky wrote:
On Friday, June 4, 2021 at 1:09:20 PM UTC+1, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to be
available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Doming it should not be too much of a problem torch or gas welding equipment and something you can use as an anvil, making the squared bit will require set and dolly. If all you want is a head then welding a nut on the end of the studding is probably the easiest solution.

Thank you. I have some studding (why is Toolstation & Screwfix so dear
for this stuff?), so I'm going to use it for a temporary bodge while I
work on the roof trusses. Now it's bliddy raining. I have found online
M8 x 240mm coach bolts can be had, and I only need 8 or so, I'll get
them in the week.

On 4 Jun 2021 at 13:09:16 BST, "Chris Bacon"
wrote:

I need 240mm M8 coach bolts (or roofing bolts). These do not seem to be
available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Any other ideas? These to join concrete uprights of sectional building.

There's them:



https://www.zoro.co.uk/shop/fastener...0/p/ZT1096927X


Not exactly what you want, and there may be cheaper suppliers!

--
Roger Hayter

On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to be
available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Any other ideas? These to join concrete uprights of sectional building.

These do exist:

https://www.tcfixings.co.uk/product/...ed-din-603/557

But the usual suspect will only have 240mm in stock for M10 and M12.

What's wrong with studding, nuts and large washers? The fact there is a
square hole doesn't mean you have to use it.

Coach bolts can be difficult to remove once the head starts turning. As
I found out recently! :-(

On 04/06/2021 13:48, Fredxx wrote:
What's wrong with studding, nuts and large washers? The fact there is a
square hole doesn't mean you have to use it.

The square shank under the head doesn't matter, roofing bolts would be
OK. I wanted a domed head to match the others. I'll order online as
people point out these can be had. Galvanized woud be nice, not BZP (ach
ptui!).

On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to be
available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Weld a nut on the end, and add enough extra weld so that you can round
it over with a grinder.

Any other ideas? These to join concrete uprights of sectional building.


Another option - forming a head on a the end of some rod:

From about 1:45:

https://www.youtube.com/watch?v=Az3s...3BD1&index= 5


(and if you have not see the video series, the whole set of them are
worth watching!)



--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 04/06/2021 14:39, John Rumm wrote:
Weld a nut on the end, and add enough extra weld so that you can round
it over with a grinder.

Was thinking of that but what a PITA.

Another option - forming a head on a the end of some rod:

From about 1:45:

https://www.youtube.com/watch?v=Az3s...3BD1&index= 5

That's a nice vice. That's a very nice vice.

On 04/06/2021 15:27, Chris Bacon wrote:
On 04/06/2021 14:39, John Rumm wrote:
Weld a nut on the end, and add enough extra weld so that you can round
it over with a grinder.

Was thinking of that but what a PITA.

Another option - forming a head on a the end of some rod:

Â*From about 1:45:

https://www.youtube.com/watch?v=Az3s...3BD1&index= 5


That's a nice vice. That's a very nice vice.

I was more impressed by the torch!

On 04/06/2021 14:39, John Rumm wrote:
On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to
be available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Weld a nut on the end, and add enough extra weld so that you can round
it over with a grinder.


Even if you don't have a welder, you can secure the nut fairly tidyly by
allowing the studding to protrude a little and peen it over with a
ball-pein hammer.

On 05/06/2021 16:06, newshound wrote:
On 04/06/2021 14:39, John Rumm wrote:
On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to
be available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Weld a nut on the end, and add enough extra weld so that you can round
it over with a grinder.


Even if you don't have a welder, you can secure the nut fairly tidyly by
allowing the studding to protrude a little and peen it over with a
ball-pein hammer.

Heating the end with a blowtorch would probably help as well...
(especially if you have a MAPP gas torch)

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

In message , John
Rumm writes
On 05/06/2021 16:06, newshound wrote:
On 04/06/2021 14:39, John Rumm wrote:
On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem
to be available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Weld a nut on the end, and add enough extra weld so that you can
round it over with a grinder.

Even if you don't have a welder, you can secure the nut fairly
tidyly by allowing the studding to protrude a little and peen it over
with a ball-pein hammer.

Heating the end with a blowtorch would probably help as well...
(especially if you have a MAPP gas torch)

Speaking of MAPP torches.. mine is very hard to ignite on the trigger.
However, I inadvertently pointed the burner upwards recently and it
ignited perfectly!


--
Tim Lamb

On 05/06/2021 21:07, John Rumm wrote:
On 05/06/2021 16:06, newshound wrote:
On 04/06/2021 14:39, John Rumm wrote:
On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to
be available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Weld a nut on the end, and add enough extra weld so that you can
round it over with a grinder.


Even if you don't have a welder, you can secure the nut fairly tidyly
by allowing the studding to protrude a little and peen it over with a
ball-pein hammer.

Heating the end with a blowtorch would probably help as well...
(especially if you have a MAPP gas torch)

True (although I find you get a secure fit even without if you do it
properly). Another option even with a propane torch is to set the
studding slightly less than flush, and apply silver solder (with
suitable flux first, of course). Which reminds me, I am almost out of
silver solder paste, I need to get some more.

Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to be
available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Any other ideas? These to join concrete uprights of sectional building.

Everything is available.

I have an Italian hardware store, that stocks all sorts of weird stuff.
If I need a #7x1" wood screw, they have it. The big box stores never
stock non-standard sizes.

I have a fastener store, and they'll just flip open the catalog
and order in for you. A couple days later, you'll have your item.
That's the place I go to get stainless fasteners (because they're stock).

There's also a machine shop near me, and they can order in for
you too. There's no customer area there, but at least you can
walk in and talk to someone. That's where I go, to get taps
or dies, and expect them to be a stock item.

When the insurance comes, and they're trying to figure out
why the building fell over, that's not the time for the
threaded rods to poke out from the rubble.

Paul

On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts).

Got them. Best price turned out to be Forest of Dean Fasteners, £0.75p each.

But they went and sent them *signed for*! Ach!

Chris Bacon wrote:

they went and sent them *signed for*! Ach!

signed-for has been treated as not-signed-for round here since covid.

On Wed, 09 Jun 2021 18:07:09 +0100, Chris Bacon wrote:

On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts).

Got them. Best price turned out to be Forest of Dean Fasteners, £0.75p
each.

But they went and sent them *signed for*! Ach!

Thanks. Bookmarked.

Components Direct can be good, too, although I looked for you at the time
and they didn't have anything.


--
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