I have ordered 300 of these contacts for a small project I am working on after looking at several other styles. These are non-insulated parts, so I wouldn't install them on a metal surface [unless they're anodized]. All parts appear to be of the same quality. Haven't found anything bad yet. Relatively easy to install. I'm concerned that the plastic will be brittle, but I didn't expect my application to be one where parts would be abused or fall off.
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