Connecting to a 10 mm threaded electrical connection

[Oily Rag]

I’d like to install another fused circuit, taking power from the 10mm threaded connector on the “downstream” terminal of the battery isolator.

Do I need or use a mild or stainless nut and should I use copper washers? It’s for low power uses and I will fit a ten amp fuse.

Any suggestions gratefully received.

 

[PaulRainbow]

Surely you remove the existing nut and any washers, fit the new connector/cable and refit the washers and nut ?

 

[William_H]

If you are adding a nut then try to repliate same material as stud and existing nut. Likewise a washer above the presumably copper lug and under the additional nut. Or as said just remove the existing nut and put the lug under the nut with a washer. ol'will

 

[VicS]

Perhaps now is appropriate to post a link to a video by Nigel Calder about the problems that can be caused by stainless steel components in high current electrical circuits.
Because it is thicker leaving an existing stainless steel nut in the circuit and adding connections on top of it would potentially cause even bigger problems than the incorrectly positioned washer described in the video.

 

[KompetentKrew]

Perhaps now is appropriate to post a link to a video by Nigel Calder about the problems that can be caused by stainless steel components in high current electrical circuits.
Because it is thicker leaving an existing stainless steel nut in the circuit and adding connections on top of it would potentially cause even bigger problems than the incorrectly positioned washer described in the video.

I thought of this immediately too.

AliExpress sells brass bolts in a variety of sizes.

 

[Poignard]

When I upgraded my boat to a two battery system I found the terminals on the change-over switch I had bought were shorter than I wanted.

I took the switch apart and found the terminals were, in fact, 10mm hexagon-headed brass bolts.

So I bought some longer brass bolts from an eBay seller and replaced the originals with them.

If OilyRag only wants one, I may* have one left over, since I had to buy a pack of 4, but I only needed 3.

* If it's not in the garage, it's on the boat I sold last year. In which case . . . .

 

[Oily Rag]

Thanks for the replies and the advice. Apologies for the late response.
My brain was in the wrong gear! Paul Rainbow was right, but I was trying to do the job without dismantling a connection made by an electrician. Just bodging as usual.