Gallery, Projects and General > How to's

Square Bolts

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Anzaniste:
Why not make 'em out of strip of the appropriate size. Drill and tap in a long length then slit them apart?

bambuko:
According to BS, EN, ISO etc  ::)
M2.5 is 5mm AF
M3 is is 5.5mm AF
Thickness for both is 1.6mm
Easiest thing to do is square stock in square collet?

mardtrp:
Here's a quick example of what your after, just do a google for coachbolts and square nuts.

http://www.ibuonline.com/productdetail/Carriage-Bolt-with-Square-Nut/4cb43ca68906a88337d1280c

For smaller square nuts using threads of 8-10 or 12 BA, please send me a private message, as I have made a machine that can do this, I can send pics if it if required, it's easy to make. The square brass required to make these nuts, is an over the counter store bought item as well.

mark

Bogstandard:
Gerhard,

A little larger size than you require, these are the smallest roofing bolts that my favourite supplier does. But I do know that in some places they go down to 5mm thread.

At this sort of price, you keep the 200 nuts and throw away the rest.

http://www.leofixings.com/productdetails.aspx?menulevel=2&level=2&catcode=60&hdnGroupCode=653&hdnProdCode=FzfGdHydyZM=#tdimg

Or 4mm Stainless

http://www.boltmeup.com/m4-stainless-steel-square-nuts-x-10-pack-4mm-sq-nuts-8523-p.asp



Bogs

mardtrp:
Not quite the type of nut he would need, the ones you put up, are plain flat nuts.

The old style nuts or coach bolt nuts, have an angled shape to the top of the nut, not just straight across flat. This made you use one side for the top only, that way the flat side was to the join.

You can see the difference in the nuts, even as small as what he's after.

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