These are screwed into the window frames of my house holding on the burglar bars. I want to take them off to clean and paint and then reinstall.

I think this is a TP3 or "trilobe" headed screw, But I'm not getting much luck on web searches finding the appropriate bit for them. Is there another name for them in common use that might help me find the right bit?

What is this Screw Called?

Jack

I got some of those driver bits of eBay. Search for Tri wing as well.

Bunnings didn't know what a pop rivet was...

mitchbat said..
I'd use an easy out to remove it then match the thread with some other form of tamper proof bolt.

+1

^^^ yep that's the one I saw. Needs a bigger one. I can't find one of these on ebay yet either. There are several dozen of these to take out if I am going to do the window frames properly and re-install them again afterwards so I need a proper bit, preferably a long one...

NewScotty said..
Tools required.
1. Angle grinder with thin blade.

Neatly grind in a slot across the head of the screw.

"I need a proper bit, preferably a long one..."

sounds like access is tight - so an angle grinder might not fit in the space.



stephen

Where are you in QLD Shifu? Call in and you can borrow one...but I was only able to get short ones.

Trying to cut a slot for a standard screwdriver may not work, looks like stainless steel, a very soft metal.

If it was me, I would just get a MIG and plug weld something in there.... there would be splatter everywhere and damaged glass, but at least you would get that screw out.

Or I would grind up something from a drill bit, which I think someone else already mentioned.