What is the dimension of the groove of LEGO part #4216 or #88393?

1 Answer 1


According to LDraw, the slot is 8 LDU wide (1 plate, 3.2mm) and 5 LDU deep (quarter module or stud, 2.0mm). Here's the relevant quads from the LDraw file for reference:



  • Thanks for answer. I guess you mean 3.2 mm wide and 2.0 mm deep? I don't know LDraw. But I guess these are the correct dimensions.
    – midnite
    Commented Jul 6, 2015 at 1:59
  • That's correct. I misplaced my decimal converting to millimeters originally, but the correct dimensions are ~3.2mm wide and ~2.0mm deep.
    – jncraton
    Commented Jul 6, 2015 at 14:00

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