Safe amount drag link or tie rod end exposed threads?

What is the safe amount a drag link or tie rod end can be threaded out from the end of the tie rod or drag link? A search gave me nothing. I already have things together and don't want to unscrew to check but believe the amount of exposed thread on a tie rod end are on the order of an inch and a half. I bought them at Speedway and are typical rod ends.
How far do you think I could unscrew them to lengthen the drag link?

 

You need a minimum threaded length engaged equal to the diameter of the stud. If 5/8-18, you want 5/8" or more thread engaged in the sleeve.

 

Yes it is more important how much is threaded into the sleeve.

 

Sounds to me like your drag link is too short. The tie rod in my hand measures 2 1/8" of thread. I sure like to have only a few threads showing with the jam nut installed, seems more secure too me.

 

A very good question. I'm there too. Anymore advice?

 

To me the more the better. More thread inserted the stronger the joint. Plus depends on the type of material your screwing into.

 

I'm using the longer one too, I think the 2 1/8' is about right, An old timer told me to have about the width of the jamb nut of thread showing.

 

for emphasis

 

Absolute minimum is 5~10 threads inside. But that won't add stiffness. It will simply engage the fastener sufficiently to get torque. You need the depth of the female threaded section of the tube to get stiffness. Pull it down and measure, then set accordingly.

 

What Grits said.

 

Thanks guys...I think I need a longer drag link and it frosts me to know I measured the first one wrong. I guess the right way to do something is the only way to do it. I care the most about steering and stopping, the rest is optional.

 

I was a machine-tool designer for 25 years. Our rule for bolt-engagement was 1 1/2 times the thread diameter minimum. Even though this is a somewhat different application, I would feel safe with that.

 

I like at least half the length of the total threads into the tie rod....if you have 2" of threads, at least 1" of the threads goes into the tie rod. I like to install the ends into the steering arms, center the tires, measure side to side, using half the threads as your guide.
OOPSSSS......I'm referring to my cross steer/straight axle setup. Might be similar on IFS set ups?

 

The first reply, by scottybaccus, is the minimum spec. for just about everything.