Security screws - what are they called?

[UnworthyBean]

Simple question for someone hopefully. What's the best way of attaching a bolt if I've got access to the back of where it's going? Don't want to use normal screws for obvious reasons.

Obviously if a burglar is gonna burgle it's not going to entirely stop them but anythings better than nothing.

 

[something daft already!!]

Torx

 

[samcat]

Loads of different types:
https://en.wikipedia.org/wiki/List_of_screw_drives

What are you trying to attach? If its screwed/bolted generally burglars wont take it as its time consuming and extra effort.

 

[Steampunk]

Simple question for someone hopefully. What's the best way of attaching a bolt if I've got access to the back of where it's going? Don't want to use normal screws for obvious reasons.

Obviously if a burglar is gonna burgle it's not going to entirely stop them but anythings better than nothing.

I think you might be talking about a coach bolt. It's just a smooth dome on the outside, so you use it where you can access the back and do the nut up on the thread. There's nothing on the outside to unscrew, so you'd have to rip it out or cut the head off.

 

[UnworthyBean]

Torx

Torx are fairly common though too so was going to avoid it. Also easy with the right size flat head.

It's for a garage. It did have a bolt on it that looked like it had rivets on - they had nothing you could grip on to on the front. Ideally that's what I'm after if they're available nut and bolt form.

 

[UnworthyBean]

I think you might be talking about a coach bolt. It's just a smooth dome on the outside, so you use it where you can access the back and do the nut up on the thread. There's nothing on the outside to unscrew, so you'd have to rip it out or cut the head off.

Bingo!

That's what I'm after. Cheers.

 

[RedvGreen]

Simple question for someone hopefully. What's the best way of attaching a bolt if I've got access to the back of where it's going? Don't want to use normal screws for obvious reasons.

Obviously if a burglar is gonna burgle it's not going to entirely stop them but anythings better than nothing.

I purchased a set of metal self-tapping security screws and metal right angle brackets to secure an old patio door. It was easy to lift off the rails from outside to ingress into the property. Now i've finished bolting the brackets in place, it will be easier to break the glass or go through the wall than lever the patio door.

My order was:

• Carbon Steel Self-Drilling Screws 5.5 x 25mm 100 Pack (54743)£6.29
• 1 x Sabrefix Heavy Duty Angle Brackets Galvanised 60 x 50mm 10 Pack (61576)£7.99

My Makita drill made short work of the drilling.

Obviously the screws and brackets are internal not external, which may be the stumbling block for you.

 

[Steampunk]

Bingo!

That's what I'm after. Cheers.

For outside get stainless or at least galvanised to stop them rusting. The stainless ones are a lot harder and much more difficult to cut or saw through.

 

[Armageus]

Shear nuts are another option:

https://www.screwfix.com/p/easyfix-a2-stainless-steel-security-shear-nuts-m8-10-pack/6624t

 

[Martynt74]

You also have this option where there is no way to undo the screw once it's fitted.

https://www.westfieldfasteners.co.u...euDFSuCYalYGD9y5R9Si930RQ63Zsv2YaAtSMEALw_wcB

The house we bought had these and i had to use an angle grinder to change the latch!

 

[kinobestew123]

Shear nuts are another option:

https://www.screwfix.com/p/easyfix-a2-stainless-steel-security-shear-nuts-m8-10-pack/6624t

Those with a coach bolt is pretty much perfect by the looks of it (if not a bit overboard and costly).

 

[something daft already!!]

I think they are called Prison Wardens.

 

[Haggisman]

You also have this option where there is no way to undo the screw once it's fitted.

https://www.westfieldfasteners.co.u...euDFSuCYalYGD9y5R9Si930RQ63Zsv2YaAtSMEALw_wcB

The house we bought had these and i had to use an angle grinder to change the latch!

Could you not just file a flat onto the sloped sides? Obviously would be time consuming, but not too difficult

 

[Steampunk]

Could you not just file a flat onto the sloped sides? Obviously would be time consuming, but not too difficult

You'd probably not be able to get enough purchase on them to undo them if they are solid even if you had a small precise file to cut a slot. A small angle grinder with a cutting disc does it in a few seconds. A few years back I had the same problem with seized coach bolts in the bottom of a fence holding the mostly rotted cleats on the concrete posts, and it's just far quicker to cut through them than use nut breakers or trying to use oil or anti-seize fluid.

 

[eddiemcgarrigle]

Clutch screws.

 

[sovietspybob]

Coach bolts? They're good as you just get a dome on one end, depends what and how your fastening though as to if they'd be any use.

 

[Mark M]

Shear nuts are another option:

https://www.screwfix.com/p/easyfix-a2-stainless-steel-security-shear-nuts-m8-10-pack/6624t

Never seen those before and I have absolutely no use for them either but might buy some anyway!

 

[Fluffybob]

Cup Square Bolt mate Just make sure you get high tensile ones.