i m guessing firstly, it would add to the cost.
and second, the scales on most sak's are
"plastic". and any sorta metal screws
which are "screwed" into plastic threads
isn't ideal. ideally, materials of both the male
and female sides of the threads should be of similar material density.
besides, the scales are attached via a snap
on method. which could and likely pop out
in due time with enough given force or produce damage like fractures to its plastic tabs.
https://www.sakhome.com/412701766
and lets not forget a sak's weight considerations that gravity and movement places upon those tabs... not great for thick
layered and heavier models, i m afraid!
structually, a sak can function minus its
scales. its there for aesthetics and egornomic reasons.
maybe only the alox models would work
with screwed on attachments.
having said that, i do agree that a pocket
clip is one feature on an SAK that would
be highly appreciated by those who love
this feature.