Suspension arms

Hi just received lower suspension arm and the ball joints are threaded with castle tops the originals being pinch bolts what is the way forward thanks in advance

You ordered the wrong arm. It happened to me once.

Well we gave registration number and that's what was sent aftermarket ones seem to be this way the genuine oem parts have the pinch bolts on hey ho found a second hand one now

Yeah, i've heard of this before.

People ordering arms from parts places, and them sending the wrong type.

Same with track rod ends.

Its the parts places, their computer databases don't really know.