Copper fixings

[Ctreanor13]

Does anyone know anything similar to this or even where to purchase a rivnut in copper? It's to replace this small brass reducer. It's in a bespoke light fixture.

Internal thread is M10x1 and fits in a 13mm hole.

Image for reference

 

[Ubique]

That looks like a brass knurled nut that has been pressed in, like these

searching for 'Brass knurled nut M10' brings up many links, including fleabay ones.
I think you'd struggle with a rivnut as it's not a flat surface.

 

[MCKDAVID]

what's wrong with the one that's in? is it loose and just spining in the copper? wee bit of plumbing solder and flux, gentle heat would soon have that refixed... cleaned up, it would be an invisible repair..

 

[Ctreanor13]

There's nothing wrong with the one that's there only it's brass and not copper and will stand out like a sore thumb.

It's threaded in (M13) and will more than likely have a spot of solder to keep it in place as its going to have a pendant and glass shade hanging from it.

 

[MCKDAVID]

copper rich paint afterwards?

 

[Parm]

They are called knurled insert nuts

i bought some a while back for a project.

available in the U.K. but very speedy. eBay will be your friend if you can wait for delivery from china

these are what I bough

Knurl Insert Nut Threaded Metric Brass Round Coppers Embedded Locknut M2.5-M6 Ne | eBay

Widely used on the injection moulding for tightly fixing. Material: Brass. You need choose the "Size" and the price will auto change. The color tone of the website's photo and the actual item could be slightly different.

www.ebay.co.uk

 

[Ubique]

There's nothing wrong with the one that's there only it's brass and not copper and will stand out like a sore thumb.

It's threaded in (M13) and will more than likely have a spot of solder to keep it in place as its going to have a pendant and glass shade hanging from it.

Ah, right - in that case, how about grinding a locknut or similar to fit inside and soldering / epoxy-ing it in place or a copper nut like this

mounted from the inside and soldered in place?

 

[Bobupndown]

If it was for me the copper and brass contrast looks fine

 

[Ctreanor13]

If it was for me the copper and brass contrast looks fine

You'd think that. (Un)fortunately we have some very picky clients (usually designers) and they pay a pretty penny so has to be spot on.

I'll pass on the above ideas the the lads working on it, I'll wait until it gets to me for QC in a week or 2 time!

 

[wyn]

You could "Flowdrill" it.

 

[500e]

Pardon our interruption...

Bit fiddly turned down & soldered in.

 

[GraemeVW]

Plate them?

If your making these, and really can't find suitable copper fittings, but have, or can find, brass ones, I could probably find time to plate some for you. Would depend on timescales and if my copper plating tank is still playing ball.
As long as you don't need loads!

 

[123hotchef]

manifold nuts are normally copper if u need to solder one in place

 

[merryman]

Copper would be totally crap if used for either nuts or bolts, it is far too soft. Ammonia turns brass a nice bronze/copper colour in seconds, try it.

 

[Ubique]

Copper would be totally crap if used for either nuts or bolts, it is far too soft. Ammonia turns brass a nice bronze/copper colour in seconds, try it.

True, most 'copper' stuff is an alloy or plated. Lightning protection stuff is Phosphor Bronze, apart from the copper tape, obviously.

 

[500e]

Don't suppose the softness will be a problem they wont be in and out a great deal I would think.
Are they lighting fittings @Ctreanor13 ? this I listed was . I turned up all others were specialized bits, we used this Co on lightning damage prevention

https://www.erico.com/catalog/literature/E1147C-WWEN.pdf

There other Co
Look at page 20

 

[Ctreanor13]

Don't suppose the softness will be a problem they wont be in and out a great deal I would think.
Are they lighting fittings @Ctreanor13 ? this I listed was . I turned up all others were specialized bits, we used this Co on lightning damage prevention

https://www.erico.com/catalog/literature/E1147C-WWEN.pdf

There other Co
Look at page 20

They will be in once and hopefully stay there for the rest of their days! Yes it's a light fitting. It's a 5m frame in a loop shape with 8 or 10 pendants hanging off it. It's going to be sent flat packed for shipping but that's easy enough for us to sort.

 

[500e]

Is there the budget to machine and solder those nuts I linked

 

[Ctreanor13]

Is there the budget to machine and solder those nuts I linked

I would say budget yes. However, our lovely CNC lathe is out of service for quite a while.i dare say something will be ground down or the copper chord grips inserted directly and soldered in. I've passed all onto the design team and the fabrication team too so hopefully some solution will be found.

Thanks to all for your help. This forum really is a wealth of knowledge

 

[dan.taylor.1]

Google copper plating. Works on a lot of solders too. Think you need copper sulphate