Whats the name (i.e. internet search term) for those bolts with a
slotted pan head. I need to improve security on my garage doors, so
replacing the screws in the external hinges with bolts running all the
way through, but it would be good if they look like screws on the
outside !
Cheers,
Simon.

On Jun 17, 7:43 pm, sm_jamieson wrote:
Whats the name (i.e. internet search term) for those bolts with a
slotted pan head. I need to improve security on my garage doors, so
replacing the screws in the external hinges with bolts running all the
way through, but it would be good if they look like screws on the
outside !

Why not just use coach bolts? There's no way anyone can turn those
from the outside.

"sm_jamieson" wrote in message
...
Whats the name (i.e. internet search term) for those bolts with a
slotted pan head. I need to improve security on my garage doors, so
replacing the screws in the external hinges with bolts running all the
way through, but it would be good if they look like screws on the
outside !


Do you mean "machine screw"? Having said that, the coach bolt idea
suggested by Matty F is far more secure because the only way to undo them is
from the inside. You could even use a dome headed bolt if the square shank
on a coack bolt causes problems. One other possibility is a type of
security screw I once saw where the sides of the slots sloped down to one
end which effectively meant that they could be screwed in by the normal
method but there was no purchase for unscrewing. There is a version of it
he
http://tinyurl.com/39gyg8v
Of course you will have a problem with that method when you decide to take
the doors off for any reason.
--
Tinkerer

Matty F
wibbled on Thursday 17 June 2010 08:48

On Jun 17, 7:43 pm, sm_jamieson wrote:
Whats the name (i.e. internet search term) for those bolts with a
slotted pan head. I need to improve security on my garage doors, so
replacing the screws in the external hinges with bolts running all the
way through, but it would be good if they look like screws on the
outside !

Why not just use coach bolts? There's no way anyone can turn those
from the outside.


Aren't they called "pan head machine screws" or something like that?
--
Tim Watts

Managers, politicians and environmentalists: Nature's carbon buffer.

In article
,
sm_jamieson wrote:
Whats the name (i.e. internet search term) for those bolts with a
slotted pan head. I need to improve security on my garage doors, so
replacing the screws in the external hinges with bolts running all the
way through, but it would be good if they look like screws on the
outside !

Slotted pan head or round head machine screw? You might find them more
difficult to get than crosshead types.

--
*Okay, who stopped the payment on my reality check? *

Dave Plowman London SW
To e-mail, change noise into sound.

On 17 June, 08:43, sm_jamieson wrote:
Whats the name (i.e. internet search term) for those bolts with a
slotted pan head.

"Stove bolts" - usually with square nuts.

They're dirt cheap and everyone ought to stock up on a few mixed
bagfuls (M5, M6, M8, M10) from Toolstation, along with mixed washers.
Just the ticket when the handle falls off the dog, or the wheel's off
your wheelbarrow.

For hinges, I generally prefer coach bolts as a minimum (many tee
hinges have square holes) and use shear-off conical nuts to lock them,
often with a spot of MIG weld too. As a quick hack for the same, rivet
the ends over a little with a ball pein hammer. Be warned that many of
these zinced stove bolts are also very lax tolerances and they might
not remain tight in service.

On 17 June, 12:07, Andy Dingley wrote:
On 17 June, 08:43, sm_jamieson wrote:

Whats the name (i.e. internet search term) for those bolts with a
slotted pan head.

"Stove bolts" - usually with square nuts.

They're dirt cheap and everyone ought to stock up on a few mixed
bagfuls (M5, M6, M8, M10) from Toolstation, along with mixed washers.
Just the ticket when the handle falls off the dog, or the wheel's off
your wheelbarrow.

For hinges, I generally prefer coach bolts as a minimum (many tee
hinges have square holes) and use shear-off conical nuts to lock them,
often with a spot of MIG weld too. As a quick hack for the same, rivet
the ends over a little with a ball pein hammer. Be warned that many of
these zinced stove bolts are also very lax tolerances and they might
not remain tight in service.

They are called roofing bolts in toolstation.
A cross head on the outside, square bolt on the inside. I'd lock with
an extra
nut on the inside. I was going to replace all the screws (6 per hinge)
with M6 bolts but I could drill a couple of larger holes for larger
bolts.
Coach bolts would need a square hole, so no good there.
Cheers,
Simon.

On Jun 17, 11:50 pm, sm_jamieson wrote:

Coach bolts would need a square hole, so no good there.

I've been known to make square holes, either with a square file or by
putting the hinge on a block of steel with a hole in it, and whacking
an old coach bolt through it with a large hammer!