Preload adjustment on Hawk 250 - what size is the adjuster lock nut?

[Jahboirosco]

Hello. Its times like these I wish I had my caliper handy. Here's a pic of the 2020 hawk rear shock. I am estimating the diameters of the lock nut and adjuster bolts are 2" and 2.5", respectively. Heres a pic with my attempt to measure using a measuring tape