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Buyers Products 2" Forged SAE Trailer King Pin with 1/4" Bolster Plate - Weld On
Buyers Products

Buyers Products 2" Forged SAE Trailer King Pin with 1/4" Bolster Plate - Weld On

Part Number: 337KP20025
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$80.43
Retail:$109.99
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5th Wheel Pin Box
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1-800-940-8924 to order Buyers Products 5th wheel pin box part number 337KP20025 or order online at etrailer.com. Free expert support on all Buyers Products products. Great prices and Fastest Shipping for Buyers Products 2" Forged SAE Trailer King Pin with 1/4" Bolster Plate - Weld On. 5th Wheel Pin Box reviews from real customers.
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Buyers Products 5th Wheel Pin Box - 337KP20025

  • King Pin Only
  • Buyers Products


Buyers Products 2" Forged SAE weldable Trailer King Pin provides strength and reliability in coupling your fifth wheel. Forged from AISI 8630 steel and heat treated to maintain a hardness of 302-363 BHN and 150,000 PSI in ultimate strength. The King Pin has a 1/4" thick bolster plate and a 3" bolster plate hole thickness.


  • Forged from AISI 8630 Steel
  • Heat treated to create and maintain a hardness of 302-363 BHN
  • 150,000 P.S.I. in ultimate strength
  • Bolster plate thickness: 1/4"
  • Bolster plate hole thickness: 3"
  • Forged steel construction
  • Plain finish
  • Made in the USA

KP20025 Buyers Products 2 Inch Forged SAE Trailer King Pins With 1/4 Inch Bolster Plate - Weld On





Video of Buyers Products 2" Forged SAE Trailer King Pin with 1/4" Bolster Plate - Weld On

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




Video Transcript for Buyers Products Fifth Wheel King Pin - Universal King Pin - 337KP20025 Review

Speaker 1: Today we're taking a look at a two-inch forge SAE trailer kingpin. This trailer kingpin provides strength and reliability and cuffling 00:00:08 your fifth wheel. It's forged from AISI 8630 steel, and heat treated to maintain a hardness of 302-363BHN, and 150000 PSI in ultimate strength.The kingpin has a quarter-inch thick bolster plate, so you see this little lip right here That measurement is a quarter of an inch from this plate right here to the edge of the lip, so that's a quarter inch. Again, quarter inch thick bolster plate.We're looking at a forged steel construction, plain finish. It is a weld-on installation. Overall diameter gives us a measurement of around eight inches.

From the very bottom of the unit to the very top of the unit, I'll place that flat edge up there and then I'll measure up to that. That gives a measurement of about four and one-quarter inches. Then from the bottom of the unit to the bottom of this plate right here, that's about three and nine-16ths inches.This portion of the unit has an outer diameter of two and 13-16ths inches. This area right here has a diameter of two inches, and the base has a diameter of three inches. Again, it's made from forged steel construction, and the products are made in the USA.

That's gonna do it for today's look at the two-inch forged SAE trailer kingpin.


Customer Reviews

Buyers Products 2" Forged SAE Trailer King Pin with 1/4" Bolster Plate - Weld On - 337KP20025

Average Customer Rating:  4.8 out of 5 stars   (68 Customer Reviews)


by:

Parts were good quality, fit as they should. Delivery arrived on time and undamaged



by:

works great



by:

Fits good. Works well for my applicati on



by:

Great product, reason for a three is they shipped this 8 pound weight with plastic items and Butyl tape that got all broken apart and squished in shipping.

Jenny N. profile picture
Etrailer Expert

Jenny N.

2/19/2022

I will have our customer service team reach out to you.



by:

Worked great.



by:

When we received this it was exactly what we ordered and worked out great. We will be ordering more to come from etrailer.com
Thank you.



by:

etrailer is awesome!! The rep I dealt with knew EXAACTLY what I wanted. Very helpful, quick service and very polite. Big thumbs up!!



by:

Great product and arrived quickly



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I think I got in over my head but had a smart neighbor able to mount this pin and attach to my trailer.



by:

Arrived quickly. Product is exactly what I needed



by:

These are great weld on kingpins



by:

Exactly what we needed, makes repairs a breeze.



by:

Order was processed and shipped within an hour of my placing it! Arrived in excellent shape very quickly.



by:

awesome,thats why I continue to order from yall,very fast shipping,i love it!



by:

I welded a hook on the back of this unit and when needed, attach it to our overhead hoist. This make installing the fifth Wheel hitch fully assembled into the truck bed - VERY EASY!



by:

Again thanks for the prompt speedy shipping. I am all the way across the country from shopping location and I get products faster than I do from neighboring states. It’s hard to believe. Keep up the awesome work, anymore I don’t even look at competitor companies just because of the positive transactions and quick shipping times.



by:

great product and fast shippin



by:

George, yes thanks this hitchpin got me back on the road just in time for the fall last year!! Thanks!!



by:

I installed the King Pin into a Goose Neck and customer is very satisfied. I liked the quality of the material the pin is made from. Welding using 1/8" E7018 was a snap!



by:

This king pin appears to be a great product. Usa made and just as described. Shipping was fast and accurate. Definitely satisfied with the product and service i have received from etrailer.com! They have totally earned a repeat customer.



by:

Absolutely the best service. We seem to be living in a world where vendors don't care and customer service has gone to the wayside. I thank God that there are still some vendors that take customer service above and beyond. Great job etrailer.



by:

Thanks for taking care of me Etrailer.



by:

Awesome service, parts came quick, and the right parts, I will be ordering again thanks etrailer.com


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See what our Experts say about this Buyers Products 5th Wheel Pin Box

  • Does Curt E16 5th Wheel Hitch Fit Curt Universal Base Rails
    They are! The Curt hitch and base rail kit you asked about are 100 percent compatible: - Curt E16 5th Wheel Trailer Hitch # C16115 - Curt Universal Fifth Wheel Base Rails with Installation Kit # C16200 This will give you industry-standard base rails, which the E16 hitch will mount right into so you can tow your 5th wheel trailer.
    view full answer...
  • Why Do King Pin Replacements Have Different Bolster Thicknesses
    King pins can be found on a variety of different trailer types; 5th wheel, gooseneck, RVs, campers, lawncare, excavating, and car haulers just to name a few. So if you're just replacing the king pin you will want to use one that has a matching bolster plate thickness: 1/4" - # 337KP20025 5/16" - # 337KP20031 3/8" - # 337KP20038 1/2" - # 337KP20050 Attached is a review video for you to check out.
    view full answer...
  • Do I Need To Install a King Pin After Removing Gooseneck Adapter from 5th Wheel Pin Box
    I would love to sell you a king pin but once you remove the gooseneck to fifth wheel adapter you have now, there will more than likely already be a kin pin installed underneath unless it was cut off which I doubt was the case. Please remove the adapter and let me know what you find. If you want to replace the entire king pin box please just let me know as we have options for that as well but we would need to know the pin box model number beforehand. In order to get the truck setup for...
    view full answer...
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Cole B
Installed by:
Cole B
Employee Kristina F
Written by:
Kristina F

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