MP 1,1-5,1 5,1 CPU Heatsink Captive Washers?

[Grumply]

Hi guys,

I'm in the middle of swapping out the CPUs on my new 5,1 build from 8-cores to 12-cores. And I've run into an irritating little issue right off the bat.

I've pulled the two heatsinks off the tray, only to discover that one of them is missing one of the captive washers that hold the four screws in place.

One of these little guys:

I'm wondering if anyone knows what the specs of the captive washer might be so that I can track down a replacement?

Cheers

 

[Grumply]

Figured it out. It's a 3mm/M3 "E Clip".