New Development......
I bought two 7 pin female recepticles One at O'Reilly's Auto and the other at a local farm Store. Both were an off brand never heard of before. I decided to try them /study them etc. since many products these days are not holding up as they should and cannot be trusted, I bought two different strange name brands. Neither one was the commonly heard of Bargman brand or the Pollack brand.
The problem was found after install that neither one could hold the truck to camper cord solidly in place. One took only 2 wiggles up and down and the lock released just as if I hit two bumps in the road. The other took 3 wiggles and it let loose and the cord fell out.
I wonder what UL Listing is doing these days? I had a client that worked for UL listing and was traveling to China often to test products before getting shipped to our markets in the U.S.A. What happened with that?
After this experience I went to the town where you can get anything you need and found they sold both well known brands, I found the Pollack brand to be the most solidly built and held the best, even had a secondary 'click' as you pushed it in as if to connect deeper onto the 7 pins. The lock on the flip up cap held so well also and did not release if wiggling the cord up and down. It was the most expensive, but is the best. Be careful what you buy out there.... some weird stuff floating around these days.
I want folks to be wary of off brand products. It would be hard to take the thought of someone getting rear ended at full speed because you had no tail lights nor brake lights if stopped on the highway. That would be awful.
