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Pollak Trailer Connector Adapter - 7-Blade Plug to 7-Pole Round Pin - Die-Cast Zinc
(36 reviews)
Price: $51.53
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Pollak Trailer Connector Adapter - 7-Blade Plug to 7-Pole Round Pin - Die-Cast Zinc
$51.53
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We'll connect you with nearby partnered installers who know this exact setup.
- All Info
- Reviews (36)
- Q & A (0)
- Videos (1)
- Photos
Pollak Custom Fit Vehicle Wiring
Highlights
- Simple Trailer Connection: Lets you link a 7-blade vehicle socket to a 7-round trailer plug.
- No Rewiring Needed: Plugs directly between existing connectors for quick setup.
- Durable Construction: Die-cast zinc housing resists corrosion for long service life.
- Reliable Power Flow: Handles a constant 12-volt load with a 40-amp circuit breaker installed.
- Versatile Fit: Works as a universal adapter between 7-blade and 7-round wiring styles.
Features to know about
Connects Different Plug Styles with No Rewiring: 7-Blade to 7-Round Adapter
If your trailer uses a 7-round plug and your tow vehicle has a 7-blade socket, this adapter bridges the gap. The Pollak Trailer Connector Adapter #PK12728 plugs right in between the two without cutting or splicing wires. You get a clean, solid connection that lets your lights and power functions work like they should.
Built Tough for Long-Term Use: Die-Cast Zinc Construction
Some adapters are plastic and wear out fast under road grit or weather. This Pollak model is made from die-cast zinc, giving it a sturdy, corrosion-resistant shell that stands up to heavy use. It’s a piece you can leave connected without worrying about cracks or loose terminals down the road.
Handles Consistent 12-Volt Power Loads: Works with 40-Amp Circuit Protection
When you’re running trailer accessories that draw steady power, the adapter keeps up. It can handle a constant 12-volt load when protected by a 40-amp circuit breaker installed at the power source under the hood. That setup keeps both your truck’s system and trailer wiring safe from overloads.
Simplifies Troubleshooting and Replacement: Standardized Connection Points
Because it uses standard 7-blade and 7-round pin layouts, diagnosing issues or swapping parts later is straightforward. If a plug notch or lid tab ever gets damaged, you can replace the connector without changing the whole setup. It’s a practical solution that keeps your wiring simple and reliable.
Specs
Connector Type
- Adapter Type: 7-Blade Plug to 7-Pole Round Pin
Material
- Construction: Die-Cast Zinc
12-728E Pollak Trailer Connector Adapter - 7 Blade Plug to 7 Pole Round Pin - Die-Cast Zinc
Replaces Pollak 12-728EP
Similar to Hopkins 47595
Item # PK12728
Video of Pollak Trailer Connector Adapter - 7-Blade Plug to 7-Pole Round Pin - Die-Cast Zinc
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for Breaking Down the Pollak Trailer Connector Adapter
Today we're going to be taking a look at part #PK12728. This is the Pollak trailer connector adapter. This adapter is going to plug into your 7-way blade style vehicle end connector and it's going to convert it for use with a 7-way round pin style trailer end connector. The housing here on this end is going to be made from a dye cast zinc construction, very strong and durable as well as resistant to corrosion and rust. This unit is going to feature easy grip design so here on the blade end connector you're going to have the finger tab right there. It's going to allow for quick connecting and disconnecting. On this end here, you're going to have a spring loaded lid. It's got a nice little finger tab right here so you can easily lift up on that and make the connection as necessary. The easy grips are a great feature to have.
They're going to allow for quick connecting and disconnecting. Then right here in between the plugs you're going to have about 8-1/2 inches of wiring. That's going to be protected with that nice wire loom protector on there so it's going to keep the wires bundled together. It's also going to protect them from any type of damage. Overall length of this unit is going to measure about 16 inches and it's going to have a voltage rating of 12 volts. That's going to do it for our review of part #PK12728. This is the Pollak trailer connector adapter.
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Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
- Did not arrive in time
Ratings & Reviews
4.8
36 reviews
by:
Kimbell
07/02/2026
You have to switch the blue and black wires, but it works!
by:
Joey T
08/29/2020
The adaptor did the trick. My friend had an older and different style connector on his older truck, so he put the mating connector on his trailer. His truck was down and we needed the adaptor to connect the trailer to my newer GMC to use the construction dumping trailer.
by:
Micheal
01/25/2023
The connection for the trailer brake is not performing
Michael
1/28/2023
Yes I have tested it,and I have also hooked the trailer to another truck that doesn’t require the adapter and it works fine.
Jenny N.
1/28/2023
I have sent the warranty return instructions in a separate email to you. You will receive it shortly.
by:
Frank E
10/14/2016
Of all the ones like this that they had on their site, I think I picked the best. This thing is excellent! Does just the trick. Good quality construction materials assembled into a solid product. Connection fits were snug as you would want. The time from order to delivery was shorter than they projected too! Very, very happy with this.
Frank E.
10/16/2017
Fine. No issues. It stays outside in the weather and still hooks up just fine.
by:
James
01/12/2018
Everything. Is very good quality. etrailer. Will always be there for you. Katrina B. Is a great sales rep. An she will go out of here way to be sure you get the right product. An all the staff will treat you the same .
by:
Andy
08/25/2023
Great service, quick shipping for 5 bucks!!!
by:
Glover G
05/31/2015
All three of the products we bought had a good solid snug fit, insuring a good connect. We have them all connected and have used them for a few days with no problems. I am glad we found your site and it easy to locate the products/adaptors that we needed.
by:
Glover G
05/31/2015
All three of the products we bought had a good solid snug fit, insuring a good connect. We have them all connected and have used them for a few days with no problems. I am glad we found your site and it easy to locate the products/adaptors that we needed.
by:
Tony A
02/21/2019
Awesome!
You guys are great!
Exactly what I needed in delivered in a very timely manner.
Thank you
We will use you for all our trailer needs
You guys are great!
Exactly what I needed in delivered in a very timely manner.
Thank you
We will use you for all our trailer needs
by:
Randy L
12/13/2019
These are of great quality. Our company has used these for about a year now and they have met the standards of our needs. As a construction company we are hard on all of our equipment. Highly recommend
by:
Zachary
09/28/2021
As always it was easy to order, and great products. Arrived earlier than expected as well.
by:
Nick
07/13/2021
Works great .
I’m going to get a second one I like it so much !
I’m going to get a second one I like it so much !
by:
Donald
06/06/2018
Could not find anywhere else. Works great thanks for your product.
by:
Jeff K.
12/03/2015
Great looking adapter. Our owner is as particular as I am, and after he saw it, I could tell he wanted me to order him one as well.
by:
Todd F.
08/30/2017
Fast & Great service and delivery, we will be back!
by:
Nick
09/11/2026
by:
Andy
08/13/2020
excellent product
by:
Samuel
10/01/2020
Great product
by:
Gary
11/11/2019
Quality piece . Fast Delivery.
by:
Timothy
08/04/2026
by:
Mike
08/30/2026
by:
Edgardo
08/24/2022
by:
Adam
01/11/2021
by:
Don
07/24/2021
by:
Donald
01/23/2023
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Show More Reviews
See what our Experts say about this Pollak Custom Fit Vehicle Wiring
- 7-Way Trailer Plug Adapter or Compatibility with Lance Slide-In Truck Bed CamperLance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we do have adapters for. If you have a 7-way round, then you will use adapter # 47595. If you have a 6-way plug then you will use adapter # 47549 or # PK12728. If you have the special Lance plug, I recommend replacing it with # A7WCB which would directly...
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- Adapter from Truck with 7-Blade to Camper with 7-Round ConnectorsAn extension is going to be male on one side and female on the other. We have a 4 foot extension, part # TLW6042, that's a 7-way on each end. We don't carry an 8 foot long extension but we do have a 10 foot, part # TLW6510, that should work for you.
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- Recommended 7-Pole Round Plug & Play Wiring Harness Adapter for 2005 Ford Super Duty Factory WiringIt sounds like your 2005 Ford Super Duty was outfitted with the 7-way blade system which is the most common in the market today. To adapt your 7-way blade to a 7-pole round for your trailer, I recommend the Pollack # PK12728. This 7-pole connector is prewired to simply plug into your truck's 7-way plug. It has the # PK11720 connector you referenced but is pre-wired like you are desiring. A great mounting bracket for the # PK12728 is the # PK11771. I have linked all the above mentioned...
view full answer... - Do You Have a 7-Pole Round to 7-Way Blade AdapterHey, Brian! We do have just the adapter for you! We have the Pollak trailer connector adapter part # PK12-724. This adapter adapts 7-round pin to 7-way blade trailer connector seamlessly. I'll also include the other Pollak adapter part # PK12728. It's pinned the opposite of the first adapter. I wanted to mention it just in case I misunderstood how your pins were on your semi. Figured better safe than sorry.
view full answer... - Adapter to Connect 7-Round on Trailer to 7-Blade on Vehicle We have exactly what you need, which is an adapter that will allow you to connect your trailer's 7-round with your truck that has a 7-blade. - Pollak Trailer Connector Adapter - 7-Blade Plug to 7-Pole Round Pin # PK12728 All you'll do is plug this in between your trailer's 7-round and your truck's 7-blade and you're all set!
view full answer... - 2022 Toyota Highlander Wiring for a 7-Way Blade Connector I would be happy to help you set up your 2022 Toyota Highlander to haul your new travel trailer. The wiring harness you currently have controls your trailer's lighting functions only. You do not need to rewire your Toyota you just need another harness. The second harness you will need is the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires item # ETBC7. The kit includes a pre-wired 7- and 4-way trailer connector that mounts easily at the...
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- Troubleshooting Bargman 7-Way Plug Not Fitting in Pollak 7-WayMost likely the notch on top of the 7-way plug is damaged which is preventing the Pollak 7-way's lid from being able to attach to it. So easiest solution would be to go with a new Pollak 7-way plug with part # PK12706.
view full answer... - Option For Connecting a Lance Camper Electrical Plug To A 2020 Ford F 450We do have a potential solution for you, but Lance campers use a proprietary plug, and there is not any adapter for your Lance camper that we are aware of. If your camper does use the proprietary lance plug, we recommend replacing it with a 7 way plug like the Hopkins 7-Way Blade Style Connector with Molded Cable # HM20041. This way you can simply plug in to the 7 way plug on your F450. We also recommend running your connections thru a junction box # 3375601101
view full answer... - Recommended Front Camper Tie Downs and Electrical for Lance Camper in 2021 Ford F-350We do have the parts you're seeking for your 2021 Ford F-350. If you wanted a stake pocket tie down, the Brophy Stake Pocket Mounted Camper Tie Downs - Bed Mount - Black Powder Coated Steel - Qty 4 # TDSF are a universal solution that would work well; the only draw back to these is that they are permanently installed and do require drilling to install. For a frame mounted solution I recommend using the TorkLift Custom Frame-Mounted Camper Tie-Downs - Front # TLF2021, which will offer you...
view full answer... - Curt Echo Trailer Brake Controller With 7-Way Round Pin Trailer ConnectionThe Curt Echo Trailer Brake Controller # C51180 needs to have a 7-way blade connector on both the tow vehicle as well as the trailer. The Custer Trailer Connector Adapter # ADP7R-7B that you found is designed to adapt a vehicle with a 7-way round pin connector to allow a trailer with a 7-way blade connection to be towed. It will not work properly with your trailer having a 7-way round pin male connector. The Pollak Trailer Connector Adapter # PK12728 will convert the 7-way round pin...
view full answer... - Is There an Adapter for a 2006 Lance 845 Camper Factory Round 7 Way Plug?The Pollak Trailer Connector Adapter - 7-Blade Plug to 7-Pole Round Pin - Die-Cast Zinc # PK12728 will actually not fit the plug you have on your Lance Camper. This is due to Lance making their own style plugs every now and then. This has caused issues before and the best option will be to replace the plug with a more common style. The Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End # PK12706 will plug into a standard 7 Blade plug, that your 2021 Sierra 2500 will...
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- Compatibility Of 7-Pin Flat To 7-Way Round Trailer ConnectorA 7 pin flat connector is normally European. It will give you the same functions as a 4-way flat. To convert the wiring to make it functional with a 4 way, you will need the Roadmaster Brite-Lite Wiring Converter # RM-732. You can use a circuit tester like # PTW2993 to determine functions for proper connection. To get the other functions for your trailer 7-way, you will need the # ETBC7 kit and a brake controller like # 90195. If you are looking to adapt from a 7 round to a 7 blade,...
view full answer... - 7-Way Round to 7-Way Blade AdapterSince your light plugs into a 7-way round you'd actually need the opposite adapter than the # F77R. Which for that you'd just need the part # PK12728.
view full answer... - 7-Blade Plug to 7-Pole Round Pin Connector Adapter Yes, we do have what you are looking for it is the Pollak Trailer Connector Adapter - 7-Blade Plug to 7-Pole Round Pin - Die-Cast Zinc item # PK12728. This adapter plugs into your 7-way, blade-style, vehicle-end connector to convert it for use with a 7-way, round-pin style, trailer-end connector.
view full answer... - Adapter for Vehicle 7 Blade Connector to Trailer 7 Round ConnectorWe have exactly what you need for an adapter to go from the 7-blade connector on your vehicle to the 7-round connector on your trailer: - Pollak Trailer Connector Adapter - 7-Blade Plug to 7-Pole Round Pin - Nylon # PK12727 or - Pollak Trailer Connector Adapter - 7-Blade Plug to 7-Pole Round Pin - Die-Cast Zinc # PK12728 The only difference between the two is that one has a nylon construction on the plug and the other is a die-cast zinc. I have added links to video reviews of both adapters...
view full answer... - Is the Pollak Trailer Connector Adapter # PK12728 Rated For A Constant 40 Amp 12V Load?Both the Lance proprietary connector and the Pollak Trailer Connector Adapter # PK12728 will be able to handle a constant 12 Volt load. After reading the Lance Proprietary Connector information, it states that in order to "protect your truck's 12 volt system from overload, a 40-amp circuit breaker # 9510 should be installed at the power source under the hood". Both of these connectors will perform the same with a 40 amp circuit breaker installed under the hood. Check your vehicles owners...
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Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
Expert Research:
Jameson C
Written by:
Laura H
Updated by:
Wilson B
Updated by:
Michael B
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Jenny N.
1/28/2023
This adapter does have a limited one-year warranty, however I wanted to ask you a few questions. Have you had the opportunity to test the seven way on the vehicle to make sure the brake signal is making it there and also testing the brake wiring signal on the trailer to see if it is making it past the seven way on the trailer?