Anchor point. Captive nut. Ducato Promaster

A captive nut I believe they are called but to my mind it is an anchor point. This will fit the 8x8mm holes that are to be found within the Ducato or Promaster Van. The default trim screw size is 4mm. The actual dimensions of the piece is 7.75x7.75. Id suggest this is printed in Nylon but I used ABS and it worked with the existing fixing screw. Print at .16 with a .4mm nozzle with the highest layer strength your printer is capable of. ABS seems to work but Nylon would be better. Prusa Slicer.