Because of the unique layering of aluminum and polyethylene with ACM Material, the use of some hardware is difficult or does not work at all. The reason being is that hardware does not have much to "grab" in the material once installed. What we found that works very well are select PEM blind standoffs.  These would be:

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    CSOS (i.e. CSOS-632-4)​:  Intended for thicker ACM sheet (at least .093), which allows the blind mounting

                                              hole (CNC milled recess area) to be deeper at .075.

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    CSS (i.e. CSS-632-8):       Intended for thinner sheet (at least .062), which allows the blind mounting hole to

                                              be shallower at .043 deep.