Where can I get the plastic screw insert used in chipboard [kitchen units].
MDF is notorious for splitting even with a pilot hole and the cranked hinges I'm using for flush fit wardrobe doors still need screwing into the edge of the MDF.
i dont know if they do sell them but screw fix will be your best chance of getting any,just go to their web site and look through the fixings pages.hope this helps
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix windows and doors.