Size of standoff holes on Classic ][

[James Harland]

Hi everyone, I'm getting things together to make a box for my Classic ][ (right now it's Blu Tack and a carboard box, which is an OK temporary solution). I tried to measure the standoff holes with a ruler, and it looks like 3mm to me, but I don't have calipers, and I have to wait a few weeks for the standoffs to arrive from China (I live in Kazakhstan), so I'd rather get it right from the outset.

So could someone please confirm for me the size of the standoff holes on the Classic ][ board?

[Spencer Owen]

Hi James,

The holes on the Classic II modules (actually, almost all RC2014 modules) are 3.2mm, designed to take M3 hardware.

Cheers

Spencer

On 24/10/2025 07:22, James Harland wrote:

Hi everyone, I'm getting things together to make a box for my Classic ][ (right now it's Blu Tack and a carboard box, which is an OK temporary solution). I tried to measure the standoff holes with a ruler, and it looks like 3mm to me, but I don't have calipers, and I have to wait a few weeks for the standoffs to arrive from China (I live in Kazakhstan), so I'd rather get it right from the outset.

So could someone please confirm for me the size of the standoff holes on the Classic ][ board?

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[James Harland]

Thanks Spencer, the sizes with M is what I've been seeing on AliExpress, so good to know I should go for M3.