Customizable Drop in T-Nut for aluminium extrusion

Customizable Drop in t-nut for aluminium extrusions.

Tested with 4040 hex m4 (included stl)

Reference dimensions also included in the SCAD file:

 <-----   A  ------>     E |-----|              |-----|  F  |------|      ^D|                  |      B  \________________/       v          CW - Width (thickness)Reference DimensionsExtrusion        A       B       C       D       E       F       W2020    10.5    3.5     6.2     1       1       5       63030    15.6    5       8.2     2       1       6       6                                      4040    19.4    6       8       3       3       8       8Hex Nut        Hole    Size    HeightM3      3.4     5.6     2.5M4      4.6     7.1     3Square Nut (DIN562)        Hole    Size    HeightM3      3.4     5.6     1.8M4      4.6     7.1     2.2