I am planning to build a frame from square steel tubes (tubes measuring 20x20x1.5 mm). On the front of this frame, I intend to screw on a 1.5 mm thick plywood sheet.
Does anyone know a convenient way to fasten the plywood sheet? Preferably with screws from the front/plywood side and without nuts on the back.
Could you drill holes through the sheet and the steel tube and then use some form of self-tapping screw?
Does anyone know a convenient way to fasten the plywood sheet? Preferably with screws from the front/plywood side and without nuts on the back.
Could you drill holes through the sheet and the steel tube and then use some form of self-tapping screw?
Thank you for your response. I didn't mention it, but the plan is to then attach so-called 3D wood paneling to the front of the plywood (weight approx. 10 kg/m2), but sheet metal screws should be able to hold this as well, right?
Will the threads of the sheet metal screw grip in the hole I drilled? I suspect it is important that the inner diameter and threads of the screw match the drilled hole. Is there a simple way to ensure they fit?
Will the threads of the sheet metal screw grip in the hole I drilled? I suspect it is important that the inner diameter and threads of the screw match the drilled hole. Is there a simple way to ensure they fit?
I guess you want countersunk screw heads, there are self-drilling screws for light beams, but they're probably not available as countersunk, and 1.5 mm is a bit too thin to screw into.
I would have bought countersunk sheet metal screws, e.g., 4.2 x 25.
Drill 3 mm through both, then 4.5 through the plywood.
I would have bought countersunk sheet metal screws, e.g., 4.2 x 25.
Drill 3 mm through both, then 4.5 through the plywood.