That's so you can loosen the two clamp bolts and turn the tie rod to shorten/lengthen the tie rod overall length and adjust toe-in.
In the modern type that Fox posted, with male ends, there's usually a sleeve with left and right hand threads to accomplish the same purpose.

Last edited by klhansen; 08/09/2019 5:09 AM.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.