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3" Wide Continuous Hinge - 6' Long - Steel

3" Wide Continuous Hinge - 6' Long - Steel

Retail:$62.17
Our Price: $56.90
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Trailer Door Hinges
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Great for your heavy-duty utility trailer, this piano hinge provides uninterrupted support for your door or tailgate. The hinge rotates 270 degrees and contains no pre-drilled holes, so it can be welded or drilled to match your setup. Lowest Prices for the best trailer door hinges from Polar Hardware. 3" Wide Continuous Hinge - 6' Long - Steel part number H300 can be ordered online at etrailer.com or call 1-800-496-5010 for expert service.
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Polar Hardware Trailer Door Hinges

  • Piano Hinge
  • Continuous Hinge
  • Steel
  • 72 Inch Long
  • 1/4 Inch Diameter
  • 3 Inch Wide
  • Weld On
  • Bolt On - No Pre-Drilled Holes
  • Polar Hardware

Great for your heavy-duty utility trailer, this piano hinge provides uninterrupted support for your door or tailgate. The hinge rotates 270 degrees and contains no pre-drilled holes, so it can be welded or drilled to match your setup.


Features:

  • Hinge provides sturdy, continuous support for the door or tailgate on your utility trailerl
  • Continuous design offers more support than smaller, individual hinges and reduces stress on heavier doors
  • 270-Degree rotation for full opening and closing motion
  • Weld-on or bolt-on installation
    • Bolt-on install requires drilling holes into hinge
  • 16-Gauge steel construction is durable and long-lasting
  • Made in the USA


Specs:

  • Dimensions: 6' long x 3" wide
    • Each side of the foldable hinge measures 1-1/2" wide
  • Individual knuckle length: 1"
  • Pin diameter: 1/4"


836 3" Wide Piano Steel Hinge, 6' Long

Item # H300





Video of 3" Wide Continuous Hinge - 6' Long - Steel

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Polar Hardware Enclosed Trailer Parts - Doors - H300 Review

Today, we're going to be taking a look at the 3" wide continuous steel hinge. It's going to measure 6' long. This is also called a piano hinge. These type of hinges are used for a variety of applications. You'll find them on tool boxes, different types of flaps, and they are commonly used for trailer ramp doors. Now, this one in particular is made from a mild steel construction. It is strong and durable, and it will resist rust and corrosion.

It's not going to do as great of a job as stainless steel, but it's still going to do a good job. It's still a nice design, mild steel. The unit's going to rotate 270 degrees, so it's going to allow for full opening. I do want you to notice that there's no predrilled holes on the unit. What that does is it makes it easier for welding applications, and it makes it easier to kind of customize it for your application.

That way, you can drill out the holes where you need them to best fit your particular application. Right now, the hinge is completely flat. If we take a measurement of that in this position, edge-to-edge, that's going to measure 3" wide. The internal pin size . There going to be a that runs right through all these knuckles here. That pin's going to give us a diameter of 1/4".

The gauge of steel that the hinge uses for its construction is 0.074". Then the over all length of the unit, measuring from edge to edge, is right on 72" which again is going to measure 6' long. Now this can be cut to fit your need. You can cut it anywhere along. I do recommend cutting right between where the knuckles separate. The knuckle links, that's each one of these pieces right here.

The knuckle links on the unit's going to be 1" long. That's going to do it for today's look at the 3" wide continuous steel hinge that measures 6' long.

Customer Satisfaction Score:


Customer Reviews

3" Wide Continuous Hinge - 6' Long - Steel - H300

Average Customer Rating:  4.7 out of 5 stars   (94 Customer Reviews)

Great for your heavy-duty utility trailer, this piano hinge provides uninterrupted support for your door or tailgate. The hinge rotates 270 degrees and contains no pre-drilled holes, so it can be welded or drilled to match your setup.

by:

I am very pleased with the products i purchased from etrailer. Very fast shipping and spot on descriptions of all the items purchased. If only all online products could be described as detailed. Any questions i had where answered either by phone or email. Thank you you so much for the great products. One stop shopping made it easy to build my off road camper. A few things purchased where the timberen hd 3500 lb axles 4 in lift with 10" breaks, marker lights,tail lights,and some interior lights as well as the trailer wiring and all the connection that go with it. . And the red arc off road trailer break kit. Thanks again.




by:

Product was as described and arrived quickly.
Would
highly recommend etrailer




by:

Would’ve given this 5 stars if it was pre drilled. Shipping was massive and not packed that well. I ever said this cuts easily was wrong. I had to cut mine to fit my 6x12 with my angle grinder, and it was not as easy as I read about.




by:

I am very pleased with the products i purchased from etrailer. Very fast shipping and spot on descriptions of all the items purchased. If only all online products could be described as detailed. Any questions i had where answered either by phone or email. Thank you you so much for the great products. One stop shopping made it easy to build my off road camper. A few things purchased where the timberen hd 3500 lb axles 4 in lift with 10" breaks, marker lights,tail lights,and some interior lights as well as the trailer wiring and all the connection that go with it. . And the red arc off road trailer break kit. Thanks again.




by:

Hinge arrived in excellent condition this morning - 30 minutes later it was welded in place! The hinge was straight & heavy enough for our purposes. I promised our client we wouldn't disclose this project until they advertised it; so, I'll post photos next month. Thank you ETRAILER.com!


Comments
Hinge is still working as promised after a year of operation.
Doug - 06/13/2017


by:

The hinge I had wanted was going to be several months out, an Etrailer rep got ahold of me and let me know about several alternatives.I decided on an alternative, and was shocked when it was delivered within two days.




by:

I needed an additional fold-over ramp for my enclosed trailer's ramp. This piano-style hinge filled the bill perfectly. Used it quite a bit, and it's made loading and unloading the trailer much easier. Great price. Durable. Easy to cut to size.




by:

Great service always from etrailer. Always have had what I needed in stock and always fast delivery.




by:

Sorry I cut up my hinge. How's that for an old man with dumb ideas? Very happy will know more later. Also including more pictures before the new hinge.




by:

I use the hinge for a ramp extension allowing to wheel thing into the trailer.
The hinge is strong and does the job well.
Keep in mind that this is NOT a stainless steel component and will incur some corrosion if not treated.

Good product.




by:

Excellent Replacement




by:

I used this hinge to make a ramp extension for the back of my toy-houler. I added a 6' wide, 3' long extension made of 3/4 inch plywood. I was able to drive my 900 pound Goldwing up the ramp and into the tralier without the grounding problem I had on my first attempt. This hinge came without pre drilled holes, which was a nice feature as I could space them where I wanted them. A word caution may be warranted. If you are planning to have your application fold flat, then stagger your holes so the bolt/screw heads to not butt up against each other.




by:

Good quality!! Worked perfect for my ramp extension!! Don’t be afraid to buy!!


Comments
Utilized on a ramp extension for my enclosed trailer: One year and still working GREAT!
Denny - 08/31/2020


by:

Bought 2, one for the top and bottom of the ramp door to our trailer to mount flaps for ease of rolling toolboxes and carts onto and off of the trailer. We don't use it much, but they have held up to 900lb toolboxes rolling over them without an issue.




by:

Great job guys. My trailer parts arrived on schedule and parts were exactly as expected. I will continue to do business with you in the future.




by:

Just arrived and it is what I expected to get. Great quality metal, strong, heavy.




by:

Exactly what I was looking for to make a small flap extension ramp for my enclosed trailer. I like the fact that I can drill my own holes to fit my application.




by:

Just what I was wanting to make a foldout ramp for my new H & H cargo trailer.


Comments
Great
Arlan B - 09/25/2015


by:

I used this hinge on a teardrop trailer that I built it worked very well would recomemd it to every one, etrailer was very easy to order from,and fast shipping




by:

Too soon to tell Looks heavy duty compared to Orig hinge Use is for transition flap on drop gate. Note shipping tube damaged /split. Needs a bit of wood strapping taped to hinge to prevent possible bent hinge.




by:

Received item earlier than anticipated, perfect just what I needed. Will order from you folks again if i need any trailer items.
Thanks


Comments
Fantastic
Bob w - 06/16/2016


by:

I bought this hinge to put barn doors on my shed, I go in and out twice a week working on a project truck these hinges have performed exactly like I needed them to. They open the 180°, so when the weather is nice the doors are open.




by:

Good heavy duty hinge, just recently cut it and am using it for the doors on a trailer. I expect that it will hold up quite well.




by:

Everything arrived in good condition as product was described. I only had a small problem with one of the latched for the cam-door lock. It was binding on the top and not allowing it to swing down. Nothing a little lubrication couldn't fix. Thank you, I will be placing another order soon.




by:

Very friendly company, fast shippers and products are as described.
THANK YOU!



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Show More Reviews

See what our Experts say about this Polar Hardware Trailer Door Hinges

  • Will 3" Wide Continuous Steel Hinge # H300 Work with 10-18 lb Door
    The 3" Wide Continuous Steel Hinge # H300 does not have a stated weight capacity, but we can safely guarantee it will work fine for a door that weighs 10-18 lbs total. This hinge is made from steel so it's very strong.
    view full answer...
  • Could the Piano Hinge # H300 be Used as a Hinge for a Trailer Ramp
    The # H300 is a 6 foot long piano hinge. It would work well for you to use as a hinge for a fold down trailer ramp. If needed, you could cut the hinge down shorter. We have several customer reviews left for this product that mention how well it worked for doing exactly what you are looking to do.
    view full answer...
  • Gauge of the Steel Used for the 3" Wide Continuous Steel Hinge # H300
    The gauge of the steel used for the 3" Wide Continuous Steel Hinge # H300 that you referenced is listed as .074".
    view full answer...
  • Can Continuous Steel Piano Hinge # H300 be Cut to Length Needed
    Yes, you can cut the hinge, # H300, to the size you need with the proper equipment. An angle grinder with a cutting wheel would be a good choice to cut the hinge. We have other hinge options if you are interested. I have linked them for you.
    view full answer...
  • How Wide is the 3" Wide Continuous Steel Hinge When Folded Out Flat and Open
    The 3 inch width of the 3" Wide Continuous Steel Hinge # H300 is with the hinge folded out flat and open.
    view full answer...
  • Which Side of Piano Hinge H300 Should Face Up
    I'd put the rib side up on the 3" Wide Continuous Steel Hinge # H300 if for no other reason it would allow you easier access to cleaning and lubricating the hinge. It will work in either orientation but with rib up you'd have easier access.
    view full answer...
  • Is a Piano Style Hinge Good for Making a Flap in a Trailer Ramp Door
    Steel hinge # SH300 should work well for a flap on your trailer. You can't get a custom length but if you need 67 inches then # SH300 would be the one to get. You can trim it to the length needed. Between you and me, go with # H300. It is exactly the same only it is mild steel. The other one, # SH300, is stainless steel. That is why there is a big price difference.
    view full answer...
  • Difference Between Piano Hinge H300 and SH300
    The difference between the Piano Hinge # SH300 and # H300 is the material the hinges are made of. The # SH300 is made of stainless steel which will provide excellent corrosion resistance whereas the # H300 is made from mild steel which won't resist corrosion nearly as well.
    view full answer...
  • Availability of Pre-Drilled Continuous Hinge That Measures 3-Inches Wide x 68-Inches Long
    The Redline replacement hinge you referenced, part # H300, measures 3- x 72-inches but is not pre-drilled. This is because this part is designed for multiple installation methods - by welding or by use of fasteners you supply. We also offer a stainless steel version, part # SH300. These hinges do not carry a specific weight capacity since that will depend on the strength of the surface they mount on. For a 150-lb door I recommend the stainless steel hinge # SH300. This hinge can be cut...
    view full answer...
  • Which Piano Hinge will Work the Best on a Trailers Ramp Extension
    Determining between piano hinges, # H300 3 Inch Wide Steel 6 Ft Long or # SH200 2 Inch Wide Stainless Steel Hinge 6 Ft Long, depends what features you find more important for your application. The # H300 hinge will be stronger in that it is an inch wider than the # SH200. Plus, the extra width will allow for more surface area on the hinge to mount to the trailer making for a stronger hinge. However, if weather conditions are a concern, the # SH200 is made of stainless steel. The stainless...
    view full answer...
  • Do Any of the Continuous Hinges Have a Weight Capacity
    Polar doesn't have any weight ratings on their hinges, but if you alternated the use of a continuous hinge, like part # H300, and a Ramp Door Hinge, like part # PLR1902, it should work well under the 800 lb load you mentioned. I confirmed this with my contact at Polar . Attached is a list of our available door hinges for you to reference as well.
    view full answer...
  • 215/60-8 Tire and Wheel Recommendation with a 4 on 4 inch Bolt Pattern
    I have a wheel and tire that is very close to what you are looking for, except it doesn't have a negative offset. The Kenda Trailer Tire with 8" Galvanized Wheel # AM3H300 has a 215/60-8 size tire and a wheel with a 4 on 4 inch bolt pattern. Only issue is that it has a 0 offset. It would be possible for you to use wheel spacers to give you the negative offset you need.
    view full answer...
  • Actual Width of 215/60-8 Tire Used on # AM3H300 Wheel and Tire Combo
    At its widest point, the # AM3H300 215/60-8 tire/wheel combo you mentioned is right at 8-1/2 inches wide. The tire is mounted on a 8 inch diameter by 7 inch wide wheel, versus the 3-3/4 inch wide wheel commonly used on 5.70 x 8 tires. A 5.70 x 8 tire is typically 18.1 inches in diameter, while the 215-60-8 will only be a tiny bit larger at 18.3 inches in diameter. The 215/60-8 tire would be quite a bit wider than what you are using now. You can see more information about trailer tires...
    view full answer...
  • Can a Piano Style Hinge be Used on a Trailer Ramp Door that is 94 Inches Wide
    The way a trailer ramp door is hinged is going to depend on how the manufacturer decides it needs to be hung so it really could be one long piece or several pieces. The hinge(s) may or may not extend all the way to the edges but most of the ones I have seen do extend the length of the door. Piano hinge # H300 is decent sized. It is 3 inches wide so it is a pretty good size. It wouldn't be used on a heavy equipment trailer or anything like that but instead be used on smaller enclosed trailers....
    view full answer...
  • Using 215/60-8 Tires on Golf Cart
    The Kenda # AM3H300 consists of a 215/60-8 tire on a 8 x 7 inch rim with a 4 lug on 4 inch bolt circle. The tire is 8.9 inches wide and 18.3 inches in diameter. If this is compatible with your existing tires and wheel bolt pattern, this wheel/tire combo should work great for you. Keep in mind that this tire is about a 1/2 inch wider than a typical golf cart tire. As long as you have the extra 1/4 inch of clearance to the inside of the tire, it should fit well.
    view full answer...
  • Can 215/60-8 Trailer Tires be Used in Place of 4.80-12 Trailer Tires
    You might be able to go to a different tire and wheel size on your boat trailer if there is space available for the different size. For a 215/60-8 tire it will be 8.47 inches wide. This is 3.57 inches wider than your existing 4.80-12 tires so you have to make sure there is space on the trailer between the existing tire inner sidewall and the nearest part of the trailer. Also the new tires will be 2.2 inches shorter. If you take the measurements and everything is going to work out then...
    view full answer...
  • Pilot Diameter of the Wheel and Tire part # AM3H300
    I went out into our warehouse and measured the pilot diameter of the Kenda 215/60-8 Bias Trailer Tire with 8" Galvanized Wheel # AM3H300 and found it to be 2-1/2 inches.
    view full answer...
  • Recommended Hinge Arrangement for Swing-Up Side Mounted Door on Enclosed Trailer
    According to the folks at TRC, the # 362100-955 hinge you'd looked at is intended for a downward opening ramp-type door that would have the load resting vertically on the spring. For an upward opening door, there would be nothing holding the door in place which would be dangerous because the door would become unhinged. A piano, or continuous hinge like # H300 would be a much better choice. You'll need to be sure to install a header of some sort above the door that's tied into the wall...
    view full answer...
  • Replacement Tire Needed for a 16 x 9.5-8 Size Tire
    The tire size 16 x 9.5-8 has a diameter of 16", a section width of 9.5" and an 8 wheel. The closest tire size that we have to that is 215/60-8 like the Kenda 215/60-8 Bias Trailer Tire with 8" Galvanized Wheel # AM3H300 that you referenced. This tire has a diameter of 18.3", a section width of 8.5" and (as the title suggests) an 8" wheel. The bias construction of the sidewall makes this tire ideal for off road use like your agricultural application. It has a ply rating of 6, a max load...
    view full answer...
  • Can Trailer Tire Size go From 165×6.50×8 to 18.5×8.50×8
    You'd have to upgrade the wheel as well. The current size you have of 165x6.50-8 fits a smaller width rim at 5-3/8 inch whereas the 18.5×8.50×8 fits a 7 inch wide wheel. So you'd want the part # AM3H325 for if you have a 5 on 4-1/2 inch bolt pattern or part # AM3H300. The tire is going to be 50 mm wider and right at 2 inches taller.
    view full answer...
  • Difference Between Tire Sizes 5.70-8 and 215/60-8
    5.40-8 is not a standard trailer tire size but 5.70-8 is and I imagine that's what you mean to type since the 4 and 7 are close on the keyboard. The tire will be right at 3-1/2 inches wider and the overall diameter will be only .2 of an inch larger. You would need a different wheel too though since the two tire sizes won't fit the same rim. For that you would want the # AM3H325 for if you have a 5 on 4-1/2 inch bolt pattern or part # AM3H300 for if you need a 4 on 4 inch bolt pattern.
    view full answer...
  • Can 18.5 x 8.5 - 8 Tires be Replaced with 215/60-8 Tires
    You are correct, the older tire size of 18.5 x 8.5 - 8 now translates to the current metric tire size of 215/60-8. When it comes to 215/60-8 tire on a 4 bolt wheel, we have two options for you, the Kenda 215/60-8 Bias Trailer Tire with 8 Inch White Wheel, # AM3H290, or # AM3H300 for Galvanized Wheel. Both are Load Range C, 6-ply, and have a 940 lb capacity at 50 psi. As for a tire's ply rating, the higher the ply rating the stronger the tire but special trailer tires are all usually...
    view full answer...
  • Replacement Snowmobile Trailer Wheels/Tires with 4-on4 Bolt Pattern
    The modern metric equivalent to your 18.5-8.50-8 tire size is the 215/60-8 size of special trailer tire. Please refer to the linked article. We do offer two options in a pre-mounted tire/wheel product that you can see on the page linked for you. Both # AM3H290 and # AM3H300 are 4-on-4 wheels with a Load Range C bias ply tire rated for 940-lbs at 50-psi pressure. AM3H290 is a white powder-coated wheel and AM3H300 is a galvanized wheel.
    view full answer...
  • Larger Replacement For 205/60-8 Trailer Tire & Wheel With 4 on 4 Bolt Pattern
    We have a couple options for you to replace your 205/60-8 tire and wheel with a 4 on 4" bolt pattern with something slightly wider and taller. A 205/60-8 measures 17.7" in diameter and is 8.1" wide, and for a bigger option there is a 215/60-8 tire, which is 18.3" in diameter and 8.9" wide. For that size tire with a wheel you have two choices: - Kenda 215/60-8 Bias Trailer Tire with 8" White Wheel # AM3H290 - Kenda 215/60-8 Bias Trailer Tire with 8" Galvanized Wheel # AM3H300 The only...
    view full answer...


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