Sure As the Sun Will Shine,
They will!
The wash arm is the improved design which had the cut outs at the ends of the arms that would spray water out at more of an angle and propel the arm around.
The blue support is all metal with a brass insert at the top which worked as a bearing surface for the arm to ride on.
Domestic machines had phenolic parts which wore out much more quickly than these parts would ever wear.
The micro switch was used as the door interlock switch on the front loaders and could very well be the same used on your machine to stop the action when the latch was opened or the lid was lifted. Anyone out there with a parts breakdown for that area of the machine?
The red pushbutton switch was used on the UM commercial units to initiate the timer to start. Those timers actually had two complete cycles on them within 360 degrees. To start the next cycle at 180 degrees you had to push the button a second time. It was all transparent to the user. They just knew to push the button.
The domestic units had the sliding actuator mounted on the right side of the front panel which pushed down on a lever which started the timer action. The earliest UM series used the same arrangement as the KD10-12 machines but there was a factory upgrade to a different timer and the switch you see in the picture.
The other stuff is worthless! They are the clamps, O-rings and a strainer screen for a line strainer that was in common use for years on Hobart dishwashers as well as many other brands. Nothing that big was ever used on the KD10-14's They had smaller strainers built in to the fill solenoids.
The asking price is fair as they became very pricey as the years went by.
If I had a unit like yours I would take a stab at them.