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Your cart is empty.Hopkins Manufacturing Corporation makes your towing experience simpler and more rewarding through innovation and value. Hopkins offers a variety of towing solutions including vehicle wiring kits, adapters, vehicle and trailer connectors, breakaway systems and much more. Today, more than 40 percentage of retail category sales are generated from Hopkins innovations. A 4 wire flat is the most commonly used trailer plug. This plug is found on small boat, utility, jet ski, snowmobile, and small camper trailers where right turn/brake, left turn/brake, tail/marker lights and ground is needed.
Eric O. Grzebinski
Reviewed in the United States on January 24, 2025
Good for the trailer
Robert R.
Reviewed in the United States on June 19, 2023
Who are you kidding? It didn't come close to fitting the trailer side connector. It did fit the car side. Both connectors were exactly the same. to inexpensive to bother returning, but I'm considering it.
Stella Rios
Reviewed in the United States on May 23, 2023
Although there’s no difference btw the “trailer”side and “hitch” side, they still seal great and work just fine. A nice touch is the small connector grease packet that comes with it. Very happy with it. I mean, for $3, it’s a sweet deal!
JohnnyT
Reviewed in Canada on August 14, 2019
Just what I needed for my factory-installed hitch.
M. Empie
Reviewed in the United States on March 13, 2019
The Hopkins 48735 4 Wire Flat Weatherproof Replacement Dust Covers work great. I wish I knew about something like this years ago. This is a 2-pack, one for the vehicle and one for the trailer. Clean the terminals real good and put a little di-electric grease on them before the cover and it will last a long time. I got tired of having to polish the terminals and clean the green-crud off every time I wanted to pull a trailer. I do not use the trailer very much to the terminals sit through Michigan seasons most of the time. These are inexpensive and a life-saver to keep your terminals clean. They have recesses built in to fit the vehicle side but must be installed opposite for the trailer. The loop is designed to fit onto the plug by stretching it over. One plug had a recessed groove for this already and the other did not. You can just push it over onto the wire and it will work fine. But if you do this when you take the cap off it may slide down the wire out of reach easily. Seems durable to last for years.
JC MEX de
Reviewed in Mexico on September 11, 2018
Es un producto básico para proteger la conexión del remolque del polvo y el agua lo busque en tiendas y no lo encontré hasta que busque en Amazon, solo sugeriría poner el tapon hembra y macho, ya que vienen ambos iguales.
WillyS
Reviewed in Canada on August 12, 2018
Good quality construction and the loop to attach to the plug is nice and snug, not slipping off. The caps fit nicely on both the male and female ends of the plugs offering good protection from the environment, etc. I would recommend this product.
Steven David
Reviewed in Canada on October 16, 2018
Having had corrosion issues in the past, these inexpensive but often overlooked item is a must
Chuck McGregor
Reviewed in the United States on April 7, 2018
Fits as expected. A must need, if you’re 4 prongs are not always constantly connected, you need this, especially with the conductivity/rust resistantant grease, to protect your 4 prong harness when not in use. Great with the extra loop so when used/ or not, you will not lose these protectors when going down the road. These will definitely protect your harnesses from the elements, saving you money for 100%, against replacement.
Customer
Reviewed in the United States on July 23, 2017
Would have liked this more if it came with one cover for the female end and one for the male but it comes with 2 of the same. It might say that in the description, i'm not really sure. I bought it awhile ago. If i read it wrong then that part is on me. .. which is why i'm still giving atleast 4 stars. For the one end of the trailer wiring, it works great!!
Knuckle Head Smith
Reviewed in the United States on January 2, 2017
I couldn't find these local so I had to get them thru the internet. I giving them 5 stars since they were cheap with free shipping and do the job of covering the 4 prong plugs on both my trailer and truck. They are the universal type which fit both type of plugs and do the job I needed done; to protect and keep the plugs out of the elements.
Martin
Reviewed in Canada on July 14, 2015
No fuss protection for the trailer end connector. Comes with a small tube of dielectric grease which further protects the terminals. Fits snugly and looks durable (time will tell)
M. Ross
Reviewed in the United States on November 5, 2012
These dust covers are for four-pin flat trailer light connectors. They do a good job of keeping dust, dirt, and moisture out of the vehicle-side terminal. Two dust covers come in the package, along with a small measure of grease to help prevent corrosion.Not much can be said about a product like this, but they are of good quality and have held up over time in the weather and wear and tear. The fit is good and they never come loose from vibration, even on rough roads. I appreciate the small tube of grease that comes with them. I reckon they could still be less expensive than they are, but represent cheap insurance even so.I recommend these to prolong the life and effectiveness of your flat connector, especially if your vehicle spends time on dirt roads or backs boat trailers into the water.
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