Well constructed, feels sturdy, but one of them was missing the screw

I bought these almost two years ago and out them away until i was ready for the holidays. I just found them this year...lol Very heavy construction. I bought two and installed the one. XMAS lights and a vacuum cleaner are no problem for this durable unit. But when I went to install the other one in the garage I realized there was no screw (you can take off the cover of the existing two outlets, and plug this one in, and then a screw holds it fast. So I'll need to find a long screw somewhere that fit it correctly.

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