That cord cap looks like the Chinese-made General Electric ones sold in places like K-Mart and Wal-Mart.
They're nasty suckers...my experience with one of them has been that the screws holding the dead-front and the rubber husk together don't tighten and grip properly and eventually they will separate, leaving the chunk of plastic with the pins stuck in the socket when you go to pull it out of the socket.
I don't know how they got the UL listing (there have been instances of Chinese manufacturers couterfeiting the UL seals, which is why now UL requires that hologram foil label on any electric stuff coming from China).
Also the strain relief clamp doesn't grip the cord jacket properly...and if you tighten those screws too much they will strip.
[This message has been edited by SvenNYC (edited 11-25-2002).]