K3 lift strut attach thread

[Dusty]

I have light corrosion around the thread that stocks out the end of the lift strut on my kf3. Is this a removable thread or a threaded plug.

[cap01]

on the IV the top end of the strut threads are the adjustable rod end

[Dusty]

Sounds the same,a female rod end on a male thread.iwould like to replace both.i only have a drawing in my assembly instructions which don't give details.An old thread in this forum leads me to believe it is replaceable,I may have the wrong end of the stick!

[t j]

The threaded rod is welded to the strut.

[Dusty]

Thanks,Not a 5 minute fix then!

[Av8r3400]

Post a photo of the corrosion. Maybe just a little clean up is all that's needed.

[Dusty]

I will post a photo when I figure how to post online.
The corrosion is only surface.I had an ac engineer take a look ,he wasn't overly concerned but recommended a cleanup &crack test. His concern was how the thread was formed, If it was machined rather than rolled? There is potential for a crack to form.If the threaded portion is replaceable ,easy fix.His suggestion is to convert to a threaded plug with a male rod end.
Has this been done by any any builders?

[Av8r3400]

Kitfox uses a welded in AN fitting like this: Link (http://www.aircraftspruce.com/catalog/appages/an490.php)

These are NOT a cut thread.

In the "bad old days" Avid used a welded in socket head cap screw for some threaded rod ends. Not strictly by the FAA Book, but functional. Still they were a rolled, not cut thread.

[jrevens]

They seem to have sort of a black oxide finish, and look a lot like they may be common threaded rod - hopefully Grade 8. They sure don't look like those plated AN490 rod ends. Anybody know for sure?

[jrevens]

They seem to have sort of a black oxide finish, and look a lot like they may be common threaded rod - hopefully Grade 8. They sure don't look like those plated AN490 rod ends. Anybody know for sure?
Actually, I believe I was thinking of the horizontal tail struts... sorry!

[Dusty]

Thanks for the information,it does look like the item from ac spruce:)
This puts my mind at ease,but i will crack test before the next annual!