3D Printing Cheat Sheet Sizes For PETG Table of contents ‥ Screw Hole Screw Head Hole Self Tapping Hole Nut Pocket Shaft Hole Screw Hole Screw hole diameter Socket Head ISO 4762 / DIN 912 Thread Size Close Fit (mm) Standard Fit (mm) M3 3.2 3.3 M4 4.2 4.3 M5 5.2 5.3 Screw Head Hole Hole to fit the screw's head Socket Head ISO 4762 / DIN 912 Thread Size Close Fit (mm) Standard Fit (mm) Large Fit (mm) Height (mm) M3 5.6 5.8 6.0 3 Button Head ISO 7380 Thread Size Close Fit (mm) Standard Fit (mm) Large Fit (mm) Height (mm) M5 9.8 10.0 10.5 2.8 Self Tapping Hole Hole diameter to use metric screws as self tapping screws. Socket Head ISO 4762 / DIN 912 Thread Size Hole Dia (mm) M2 1.7 M3 2.7 Nut Pocket Polygon hole to fit a nut Hex DIN 934 Diameter of a circle where the polygon (nut) is inscribed. Thread Size Close Fit (mm) Standard Fit (mm) Height (mm) M3 6.2 6.4 2.5 Nylock Locknut DIN 985 Diameter of a circle where the polygon (nut) is inscribed. Thread Size Close Fit (mm) Standard Fit (mm) Height (mm) M3 6.2 6.4 4.1 Square Nut DIN 562 Thread Size Close Fit (mm) Standard Fit (mm) Height (mm) M3 5.5 5.6 2