Security bolt / screw

Anyone name this/the tool I need to use with them please? on a light fitting over 20 years old and need to get inside them!




Thanks

According to this guide it's a Freearson https://www.grainger.com/know-how/equipment/kh-screwdriver-types-uses

I can't tell from the picture if that triangle is recessed within the surround, or projects.
If it's the latter it wouldn't be hard to make a spanner with a bit of flat steel, drill a hole and file it into a triangle.
If it's recessed, maybe shape the end of a bit of round tube of appropriate size, around a triangular file.

Multifunction Tool ?????

A small Bi-Hex socket will normally remove them in the absence of the proper screwdriver

Thorn used a screw like that on quite a few of their bulkhead type fittings

If it’s a male head a street lighting key should fit…I have various sizes. If it’s female then a couple of appropriately sized screwdrivers percussively fitted will work

If you don't own a pair of these, you should. They are amazing at gripping things end on

https://www.knipex.com/products/pip...ers/knipex-twingrip-slip-joint-pliers/8202200

Murdoch said:

Anyone name this/the tool I need to use with them please? on a light fitting over 20 years old and need to get inside them!

View attachment 16840


Thanks

Click to expand...

Can't really tell off the photo what sort of dimensions we are looking at?

But "Tri-head" seems to be a common name for triangular security bolts/screws..

e.g.
https://www.alcomet.net/product/tri-head-driver/

Maybe worth an email to one of numerous companies who specialise in security type screws/bolts etc..
e.g. https://www.hafrenfasteners.com/about-us
or https://jandsfasteners.co.uk/tri-head-security-machine-screws-stainless-steel-a2/
etc..

mort2376 said:

View attachment 16841
Multifunction Tool ?????

Click to expand...

But obviously you would actually need a pair of these...?
To allow for both Left-handed and Right-handed applications....!

A useful tip is to wrap a bit of PVC insulation tape around the handle of the Right-Handed hammer..
so you don't accidentally pick up the Left-handed one for the wrong usage!!

It is never good to whack a right-handed fixing with a left-handed hammer.. As that would be just asking for trouble!!

But there aren't many problems that a good quality pair of Left & Right handed hammers can't fix!!

So if all else fails remember the guidance from our esteemed member Mort2376..!

And do not forget to multiply all comments in this post by the Friday-Night-Beer-Correction-Factor to discard any waffle and/or tosh!!! (If there is any?)

"Tri-Head" is possibly my only useful contribution!?