Yes , metric fit but thread is too course.They could well be 5/16” UNF although most use 8mm metric coarse.
I guess we are talking about the two bar nuts here!
John
Sorry nothing to measure with and phone camera is cack, screen has slight shake blurring any photo’s.Can you post a fairly close up pic of the threaded part in its position on the saw?
Do you have access to thread gauges , mic or vernier gauge
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