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?

Can buy them off the shelf at bunnies... Look for a Stanley kit and get all kinds of cool bits for undoing other stuff...

What is this Screw Called?

Jack

Well, Bunnings only had a tiny little one inside a set of thirty different types. They said I'd have to contact the company that installed the bars.

I think I'll get an old bit and grind the shape into the end.

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

Cut straight slot and use a standard screwdriver ............. no one will even know what that is these days !!!

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

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

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

+1

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

Bunnies don't know a lot of stuff... that is why they are bunnies...

Still, this is an off the shelf product, which you can use with your impact driver.

www.bunnings.com.au/stanley-31-piece-bit-set_p6060003

I take it the bottom right is the one that is too small... presumably you need the 5 mm, not the 3.5 mm...

^^^ 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...

Tools required.
1. Angle grinder with thin blade.
2. Wide slot head screwdriver (head needs to be much wider then the trilobe head).

Neatly grind in a slot across the head of the screw.
Slowly loosen screw head.
Tip: you want the flat head to neatly fit into the slot you grind out. You only get 1 crack at getting it right.

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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

One word when I look at those types of screws.... McDonalds

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

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

Most security bits are short.
Just need an extension for about 10 bucks

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'd get a trilobe, torx or hex bit, and grind it until it fit properly. Then use extensions to be able to get in there with a drill on the other end.

I've done this before for other types of security screws.

For the few screws that you'll massacre I'd get in there with a dremel and cut a flat slot, then use a slotted screwdriver.

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.