raspberry pi4 Missing screws for Raspberry Pi 4 Copper heatsink + NesPi 4

[Shutset]

Lately, I bought a kit composed of a Retroflag Nespi 4 Case along with a Raspberry Pi 4 pre-installed with a 3D printed spacer for a Noctua fan.

I wanted to improve the cooling even further with a big copper heatsink which I ordered.

 

I removed the smaller heatsinks and put the bigger one on but I found that none of the screws it came with are long enough to

keep the heatsink fixed through the pi to the NesPi cases screw holes since that wasn't it was designed for in mind.

 

 

The screws that fixed the 3D printed spacer to it is too thick to fit the heatsinks holes so now I'm stuck.

 

Does anyone have any idea exactly what screw measurements I should look for?

Thanks.

[TatamiMatt]

12 minutes ago, Shutset said:

Lately, I bought a kit composed of a Retroflag Nespi 4 Case along with a Raspberry Pi 4 pre-installed with a 3D printed spacer for a Noctua fan.

I wanted to improve the cooling even further with a big copper heatsink which I ordered.

 

I removed the smaller heatsinks and put the bigger one on but I found that none of the screws it came with are long enough to

keep the heatsink fixed through the pi to the NesPi cases screw holes since that wasn't it was designed for in mind.

 

 

The screws that fixed the 3D printed spacer to it is too thick to fit the heatsinks holes so now I'm stuck.

 

Does anyone have any idea exactly what screw measurements I should look for?

Thanks.

Do you have any pictures of the screws alone/isolated and any measurements with a ruler or preferably verniers? I can probably pull the picture into a software and scale it to size and measure based on any measurements you give

 

something like this

 

Also USA or EU (for relevant screw measurements)

[Needfuldoer]

You need longer screws with the same thread pitch. If they're M2.5 thread screws, you might have a hard time finding them at a big-box hardware store. Check a local well-stocked Ace or True Value, or pick up a small Metric assortment online.

[Shutset]

I'll be sure to give you the photos and measurements later today.

[Shutset]

Voila!

 

Here's the screws for the 3D printed spacer. Seems about 8mm long. I also checked the thickness and it seems 3mm thick.

 

And here are the screws that came with the big heatsink. Apparently 5mm for the top one and about 3mm for the bottom one. Also both about 2mm thick.

[TatamiMatt]

35 minutes ago, Shutset said:

Voila!

 

Here's the screws for the 3D printed spacer. Seems about 8mm long. I also checked the thickness and it seems 3mm thick.

 

And here are the screws that came with the big heatsink. Apparently 5mm for the top one and about 3mm for the bottom one. Also both about 2mm thick.

Thread length looks to be around a 4/4.5mm screw or about 3/16, you probably need closer to around 8-10mm or 3/8 (youll need to measure this yourself, top of heatsink to not quite the bottom of the female threading on the Raspberry Pi casing, you dont want to hit the bottom before its tight as you wont get good contact pressure but also be careful screwing it down as it wont bottom out and you can crack the PCB with too much pressure)

 

Threads look like M2/M2.5, more than likely coarse pitch thread by the looks of it, youll find this by measuring the thickness of the threads (for accuracy id recommend doing this yourself as this is only educated guesswork). If youre looking for american measurements for threads, oh god i dont know where to start, 5/64 for M2 or 3/32 for M2.5 is my best guess?

 

For reference

 

[Shutset]

I'm from England so we obviously wouldn't use US measurements.

Anyway, I just measured the legs of the spacer together with the heatsink and pi and estimated I will need screws

with a diameter of 2mm and a length of about 2cm/20mm.

[TatamiMatt]

1 minute ago, Shutset said:

I'm from England so we obviously wouldn't use US measurements.

Anyway, I just measured the legs of the spacer together with the heatsink and pi and estimated I will need screws

with a diameter of 2mm and a length of about 2cm/20mm.

Sounds good, let us know how it goes sure,  M2x20 should be decently available from online retailers, 

 

https://www.amazon.co.uk/TOP-VIGOR-Stainless-Replacement-Motorcycle-Professionals/dp/B0D66SLNM5/ref=sr_1_1?crid=1E6ZLHTNCSBDT&dib=eyJ2IjoiMSJ9.3aUwVQ-5JQGN-74Pw-N3sOQzFDaf34P8F0OXfqPf6fbrDrr5w3RXxEekB0U6nGpz2l5knSzrqc4NFH0vPy0PjgrgrUHQPZ6Fljm0BiWqUi33Nn3I5eNl_D32iQYWuiGS4CMZugge-Sc5qj_JjSKvOYuzgS7jWZUvtOGJHoSvvI_skC-0lLGBXN2WkEEoaBnPU84up2F1VzcMO3O1w0unzwFJpbzKc5YCrVG7Nm6cqwakA-NDM42_vPIjpQKyxXI5CWYFX7R1XnVsL5gOTUJtyRrnesq5nrPP59w-uaJBH_k.1UzR47B1YALjR3zTVahwjqyj92xKTYjmw-ZcOpMKgkQ&dib_tag=se&keywords=M2x20&qid=1744980808&refinements=p_85%3A20930949031&rnid=20930948031&rps=1&sprefix=m2x20%2Caps%2C233&sr=8-1&th=1

 

This is the cheapest set of M2x20 SCs (socket caps) i could find on amazon, just make sure 20mm isnt the full height and that you have some room to torque them enough before hitting the bottom, and you could just hacksaw off what you dont need if that is the case