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This adapter converts a 4-way round connector to a 4-way flat connector. The durable ABS plastic adapter is compact, and pull grips on the flat end make it easy to install and remove.
Features:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we are going to be reviewing Part# ADP001. This is the Custer Trailer Connector Adapter, four-way round to four-way flat. So it's going to convert your round trailer connector to a four-way flat trailer connector. It's got the nice easy-to-use pull grips. It's going to make the plug easy to install and remove. This is going to made from an ABS plastic construction, very strong, durable, and long-lasting.
If we take a measure of the approximate length, measuring from edge to edge, it's going to give us a measurement of about 3-1/2, 3-5/8 of an inch, somewhere right around there. It's really to simple to install. This end right here is going to plug into the four-way round connection on your vehicle. Then, on the back side of that, it's going to expose the connection point for the four-way flat connector. That's going to do it for our review of Part #ADP001. This is the Custer Trailer Connector Adapter, four-way round to four-way flat.
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Average Customer Rating: 4.2 out of 5 stars (25 Customer Reviews)
This adapter converts a 4-way round connector to a 4-way flat connector. The durable ABS plastic adapter is compact, and pull grips on the flat end make it easy to install and remove.ITEM ON ROUND END WAS LARGER THAN ROUND SOCKET ON TOW VEHICLE. DIDN’T FIT.
Great product, just what I ordered.
I couldn’t find this adapter anywhere else until I came upon it at etrailer.com!!
I have ordered other products from etrailer and have been completely satisfied with those products as well. Thanks.
Tried it and it fit perfectly...
If you are looking for a 4-round to 4-flat adapter that fits the "heavy duty" 4-round plug, which seems to be rare, this is the adapter you're looking for. The pins on the "heavy duty" four-round plug are wider than the standard 4-round.
I purchased a $5 adapter on a Sunday and paid $25 for 2nd day air and didn't get my adapter until Thursday late evening... Sure, I bought from etrailer before and no problems but this sounds like a rip-off. I will sureply accept my shipping money back. 4 business days later is not 2nd day air.
This adapts to the "heavy duty" round outlet with one thin and three thick pins (fits my '95 Lazy Daze). Round outlet's lid/latch engages correctly. Flat side relies on friction. Molded housing seems strong and fits snugly.
Note: some descriptions say "length = 4 ft". That should be 4 inches.
My stock wiring plug receptacle (4Round) on my Fleetwood Motorhome is not wired the same. Could not use it for my application.
The round end will not fix the round socket on the truck. It was made with too large a diameter. Tried to find a socket that it would fit at several auto parts stores and at U-Haul main store and none had one that would fit. Bummer. It's of no use.
We plugged it in and it works great. Still working great a year later. Very happy with our purchase.
Wonderful sight too easily order from with fast fast delivery and great prices! Thank you for this great product
Works as shown. It is hard to push into the Pollak socket on the vehicle and seems a little flimsy...have to be gentle with it.
did not fit the female end so I tried to grind it down a little and it is no longer useful - probably would have been ok if it fit
Great product.
Great product, worked just as expected. Thanks
A great product.
just what i needed
Fast service very good
ok
Works as it should/ described. Fast shi pping
Received. Thank you very much!
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Brooke M.
3/8/2024
I am sorry to hear that! This type of 4 pole round plug is very outdated and only seen on older trailers and vehicles. I have heard of older ford trucks having a smaller 4 round plug receptacles on their trucks. I wonder if that is the adapter didnt fit? Since the adapter didn't work, your only option would be to rewire your truck with a new 4 flat. What's the year make and model of your vehicle? Would you be able to email me pictures of the port on your vehicle?