I have the style you show on my Pantera for 13 years, no issues, you don't need to remove the knurled nut just loosen it, so not sure how it cross threads?
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.