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

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

Item # 337BKPT809B

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Fifth Wheel King Pin

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Shipping Weight: 14 lbs

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Buyers Products Universal King Pin - 337BKPT809B
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  • Buyers Products
  • Universal King Pin
Call 800-298-8924 to order Buyers Products fifth wheel king pin part number 337BKPT809B or order online at etrailer.com. Free expert support on all Buyers Products products. Guaranteed Lowest Price and Fastest Shipping for Buyers Products 2" Forged SAE Trailer King Pin with 1/2" Bolster Plate - Bolt On. Fifth Wheel King Pin reviews from real customers.


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Buyers Products Fifth Wheel King Pin - 337BKPT809B


Buyers Products 2" Forged SAE 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 1/2" 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: 1/2"
  • Bolster plate hole thickness: 3"
  • Forged steel construction
  • Plain finish
  • Made in the USA


BKPT809B Buyers Products 2 Inch Forged SAE Trailer King Pin With 1/2 Inch Bolster Plate - Bolt On







Video of Buyers Products 2" Forged SAE Trailer King Pin with 1/2" Bolster Plate - Bolt 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 - 337BKPT809B Review

Speaker 1: Today we'll take a look at a Two Inch Forged SAE Trailer Kingpin. This trailer kingpin provides strength and reliability in coupling your fifth wheel. It's forged from AISI 8630 steel, and heat treated to maintain a hardness of 302-363BHN and 150,000 psi in ultimate strength. The kingpin has a half inch thick bolster plate. Again, constructed of forged steel construction; has a nice plain finish on it. The holes right here, take a measurement of those, straight across from one another.

They are separated apart on center by 6 3/4 inches. The overall diameter of this plate is eight inches. Here are the measurements I want to give you real quick. From very bottom to very top, so I'm gonna place a flat edge across the top and I'll measure up to that flat edge. That measures 4 1/2 inches.

From very bottom to the bottom of the top plate, so this base right here, so that's 3 13/16ths inches. This portion has a diameter measurement of 2 13/16ths inches. This portion right, edge to edge, has a diameter of two inches. Then edge to edge right here at the base is three inches in diameter. Again, nice durable steel construction and the product is made in the USA.

That's gonna do it for today's look at the Two Inch Forged SAE Trailer Kingpinm.

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Ask the Experts about this Buyers Products Fifth Wheel King Pin

Do you have a question about this Fifth Wheel King Pin?


  • Troubleshooting Short King Pin on a 1972 5th Wheel Trailer
  • It sounds like you have an older 5th wheel pin box and you need to either replace the king pin or replace the entire pin box. To replace the king pin you most likely would need a weld-on option like the Buyers # 337KP20038 which has a 3/8" bolster plate. If you would rather go with a bolt-on option then we do have part # 337BKPT809B but you need to make sure that you pin box is in excellent condition to ensure that this will hold up properly. We do carry replacement pin boxes as well...
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Info for this part was:

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

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