Looking for KFC225 autopilot red disconnect button

On Sat, 21 May 2005 09:08:10 +0100, Peter wrote:


Rich Grise wrote

The existing shaft on the switch has a male threaded stud. The
button (or knob) needs a female thread. But I'd think that even
in UK, there's _somebody_ _somewhere_ who has a 4-40 nut or a
6-32 nut on hand, just to check. As Peter said, if he knows
the thread size, he can make a button.

It certainly isn't 4-40 (which I assume is 4-40 UNC, same as commonly
used on D-connector male screwlocks) as that is too big. The thread OD
is slightly less than 3mm.

Oh, dear. That's a tiny little bugger. I was thinking of the ones
I'd seen many years ago, in the US military. For what it's worth, the
next smaller common sizes are 3-48 and 2-56, but I imagine you've
looked them up by now.

Sure I could get some screws...

BTW the price of the whole switch was quoted at US$72... but this is
AVIATION Naturally, it would come with a batch number and an 8130-3
form with a nice rubber stamp on it.

Yeah, for that price, at least in my case, it's worth doing a little
bit of sculpture or what-not. Do they have "Sculpey" over there? It
behaves a lot like modeling clay (which I believe the Brits call
"plasticine"), but when you mold it to the shape you want, you can
bake it and it hardens to the consistency of bulk HDPE, or a little
harder.

I'm also a little surprised that by this time somebody hasn't come
up with a knob from their junque box and dropped it in an envelope yet.

Good Luck!
Rich

I bet they have one at SkyCraft Parts and Surplus in Winter Park
Florida. email me a good closeup picture of the unit or the switch.