Sorry i did't explain myself very well it was the horizontal pin that the whole strut rotates upward on . I'M NOT SURE WHAT THE ENGINEERING TERM FOR IT IS BUT ? IT IS THE BAR IN THE CENTRAL AXLE HOLE IN THE RETRACT THAT THE HEAD OF THE MECHANISIM ROTATES ON WHEN THE STRUT MOVES UPWARD , THERE ARE NO GRUBSCREWS THERE , []IT JUST SLIDES IN AND OUT WITH NO RETENTION