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Security Bolts, Hasps & Coach Bolts?

Rod

Rod

Old Oak
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I've noticed, over the years, that security ironmongery often have square fixing holes as well as circular ones.
Which leads me to think some sort of coach bolt (as they have a square section under the head) should be used for added security?

Doing a search the smallest coach bolt seems to be M6's which are far too large for the fixings I have.
Anybody have any suggestions of a suitable bolt M3 or M4 size?
Of course I can just forget about the square section and use a normal round shaft one?

689a74421e5a6f21f660ebe75c0cb467.jpg


Rod
Rod
 
Rod":2rgj3d2q said:
I've noticed, over the years, that security ironmongery often have square fixing holes as well as circular ones.
Which leads me to think some sort of coach bolt (as they have a square section under the head) should be used for added security?

Doing a search the smallest coach bolt seems to be M6's which are far too large for the fixings I have.
Anybody have any suggestions of a suitable bolt M3 or M4 size?
Of course I can just forget about the square section and use a normal round shaft one?

689a74421e5a6f21f660ebe75c0cb467.jpg


Rod
Rod
Click to expand...
Use bolts all the way through with a plate on the inside or penny washers and lock nuts. It will the be difficult to undo irrespective of head or shank type.
Bob
 
The locks I bought most recently came with fixings, including bolts and nuts for the square holes. They were not designed to fit through a 100mm thick insulated door so never used. But not really an issue as I only remember to actually lock the workshop about a quarter of the time :oops:.

Terry.
 
Rod - I hope you wont mind my adding a thought - at one time I had a workshop in West Wellow at the back of the back of beyond with all my most beloved machinery and tools so I was a bit conscious of security . I had a big Yale padlock and a heavy bar/plate both sides of the door so " they" couldn't get the lock off without a lot of trouble . But a chain is only as strong as its weakest link , and it was a while before I realised that the big strap hinges were only screwed to the door . It would have been a quick job to simply crowbar the hinges off and open the door on the hinged side . So all aspects need to be addressed . I also had security grills screwed on the inside of the window , got those from Ninnim , the blacksmith at Micklemersh . And I had pieces of hardboard hung on nails inside the windows so nobody could see in when the place was locked up .

Steve
 
The holes are square because they are meant for those dome-headed bolts, which don't have any way to hold with a spanner or screwdriver, but have a small section of square shaft just below the head. That way they can't be removed from the outside. I'm not sure if they are originally used for fencing.

http://beeversales.com/products/fasteners/cup-square-dome-head-bolts/

As for the thing about tee hinges......have a look at my shed thread, as I have a neat trick for fitting them in such a way that they can't be removed from outside.
 
Given that burglars now have the use of battery powered jigsaws etc., nothing much that you do with the fixings is going to stop a really determined attack, they can just cut around the security devices. A large dog beats coach bolts anytime ! I prefer male short haired german pointers, look agressive, but are lovely (at least to people they trust).

Mine had 10m2 of fenced outdoor run with a (dog sized) entrance into the barn/workshop where he had his kennel. Free to move anywhere in the barn, but constrained outside. He spent the day with us, but slept in the kennel/outside run. Worked very well !
 
Steve I realised how easy it was to get into my old shed as the 20 yr old screws came out very quickly!
That's a very neat solution Mike and something I'll have a go at.
I realise that nothing stops a determined thief but I hope what I do will make them try elsewhere.
It's only going to be used for storage - mainly garden stuff. My woodworking gear is housed in my attached double garage behind a steel door.
Having said that, years ago, my "secure" Site Office (modified steel container) was broken into by cutting out a hole in the metal side.
Nothing stolen as I only kept paperwork there but the thief messed everything up.

Rod
 
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