I just got my spacers from Zenclosures. I'm noticing that the screws that came with the spacers are too long and too skinny. However, as shown in the pics, the screws came with a washer, a crush washer, and a nut. How the heck does this work? I'm truly confused. I cannot use the nut to lock the screw down because the screw hole is blocked from the inside. Anyone had this same experience? Do i just have to go buy new screws? Thanks in advance.