FireStik3H Heavy Duty Stainless Steel Antenna

Do i need a spring to attach the antena or just screw antena to coaxial

Will this bang a 4' firestik 2 antenna against the back of my cab if mounted in the drivers side stake hole of a pickup truck when stopping and stuff?

What mount do you need for this spring? a link to one would be great if possible

Will the base of this spring screw on to a 3/8 magnetic base mount?not using this fire stik ss3h heavy duty spring for any vehicle