That looks like a press in cover for electrical boxes, with chrome plating. As long as the hole size is the same it should work. Although in your picture, it doesn't look like it covers up the locating notch in the hole. I have one of those (only in paint) that was in the cigarette lighter opening in the dash on my AD. It has spring fingers on the back like the picture.

Here's something similar but more secure: Link
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Knockout plug.jpg (5.91 KB, 48 downloads)


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.