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Ralph Mowery

In article ,
says...

On Wednesday, January 24, 2018 at 7:21:20 AM UTC-5, Mike Coon wrote:

Multiples of 1000 are written "k" not "K". There is an erroneous belief
that capital multipliers are 1 and lower case means divisors. This rule
works OK except for 1000...

As already noted, there are almost as many codes as makers. In my (very) old Centerlab Catalog, I did find references to W-Taper pots, but nothing conclusive at all on K or k taper as a specific reference.

With the additional hint of this being a slider, further googling got me to drill bits, but nothing on pots, linear or rotary.

All that is what makes things 'interisting'. I believe the K is for
Kelvin temperature and that made them use the k for 1000.

Too bad that many companies seem ot use their own code for part numbers.
I really hate the companies that use their part number on standard parts
and if you need to replace them, you are almost forced to go to the
origional company or one of their repair man. Friend in the auto
repair business told me that often a luxulary car part would be the same
as a less expensive model. They use a different number and higher price.