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  1. Trailer Door Hinges
  2. Redline
  3. Hinge Pin Nipple
  4. Build Your Own Hinge
  5. 2 Inch Long
  6. 3/4 Inch Diameter
3/4" Diameter Hinge Pin Nipple, 2" Long

3/4" Diameter Hinge Pin Nipple, 2" Long

Item # HPN342
Our Price: $8.20
Trailer Door Hinges
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.18 lbs
In Stock
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Hinge pin nipples are aligned and welded to either the outer frame or the gate/door so that the hinge pin can be inserted to create a custom, heavy-duty hinge. Great Prices for the best trailer door hinges from Redline. 3/4" Diameter Hinge Pin Nipple, 2" Long part number HPN342 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (19)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Trailer Door Hinges - HPN342

  • Hinge Pin Nipple
  • Build Your Own Hinge
  • 2 Inch Long
  • 3/4 Inch Diameter
  • Weld On
  • Redline

Hinge pin nipples are aligned and welded to either the outer frame or the gate/door so that the hinge pin can be inserted to create a custom, heavy-duty hinge.


  • Build your own hinge
  • Great for trailers and agricultural applications


  • Inner diameter 3/4"
  • 2" long

HPN342, Hinge Pin Nipple 3/4" ID 2" Long

Video of 3/4" Diameter Hinge Pin Nipple, 2" Long

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

Video Transcript for Redline Enclosed Trailer Parts - Doors - HPN342 Review

Customer Satisfaction Score:

Customer Reviews

3/4" Diameter Hinge Pin Nipple, 2" Long - HPN342

Average Customer Rating:  4.9 out of 5 stars   (19 Customer Reviews)

Hinge pin nipples are aligned and welded to either the outer frame or the gate/door so that the hinge pin can be inserted to create a custom, heavy-duty hinge.


The trailer door hinge lock works great. The only complaint I had was the ends don't fit the pipe very snug so i drilled and tapped some holes and added set screws.


No problems using this with the matching pin to fix/replace a Haulmark Cub ramp door hinge that the factory only tack welded on at the ends (which ripped off).


Small parts but totally needed. Appreciate you putting together matching pieces so everything worked as needed.
I Always use e-trailer for anything I need and will
Continue to do so in the future. Small or large, your service is always equally fantastic.


Worked great. Wanted to make an additional gate for my trailer and this item worked perfect with the existing hinge that was all ready on my trailer.


Second time I have bought from these guys, and they are my go to supplier for these kind of parts. Easy to navigate the site, easy check out, and received in less than a week with just the standard option! Haven't had a chance to do the work yet, but product quality seems solid and well made. Highly recommend!


A big improvement over the homemade hinges that the manufacturer of my trailer used. These should last much longer.


Very pleased with etrailer, my first choice. Thanks!


Product is exactly what i wanted and got to me in an ok time fram. Would have gotten to me sooner if ups brought it to me but instead transferred it to the post office which added an extra day.


Great product gets the job done!


Great hinge. Just wish they made bigger and longer ones too.


Great product!


Very pleased with this product fits like a glove thank you for your parts sincerely Joe gross


The video about this product took all doubt away about the dimentions. Just what I needed.


Just what I needed. Speedy delivery


Great product for the price


good price


Good quality.


was as advertised.



See what our Experts say about this Redline Trailer Door Hinges

  • Hinge Pin Socket to Use with part # HP344G
    Yes the part # HP344G is only one part of the hinge. You would need the part # HPN342 for a 2 inch long socket or part # HPN34214 for 2-1/4 inch long.
    view full answer...
  • 6 inch Long Trailer Hinge that is 3/4 inches in Diameter
    For a 6 inch long hinge setup that has a 3/4 inch diameter you would want the part # HP34G and # HPN3342. These two pieces together will give you a hinge in the dimensions you requested.
    view full answer...
  • Can the Polar Door Hinge PLR1902 be Separated?
    The ends of the Polar Ramp Door Hinge # PLR1902 are actually welded on, so they cannot be separated. However, we do have a few other options available for you. The Polar Dump Door Hinge # PLR1904-Z does use a bolt to hold everything together. There is still a zerk fitting to allow everything to be lubricated. It is quite a bit different, however, so the next option may be a better option. The Redline 3/4" Greasable Hinge # HP344G can be paired with # HPN342. This could then be adapted...
    view full answer...

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Info for this part was:

Employee Jeff D
Installed by:
Jeff D

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