Buyers Products 2" Forged SAE Trailer King Pin with 5/16" Bolster Plate - Weld On
(62 reviews)
Price: $71.96
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Buyers Products 2" Forged SAE Trailer King Pin with 5/16" Bolster Plate - Weld On
Item # 337KP20031
Retail:$128.18
Our Price: $71.96
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In Stock
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Buyers Products Fifth Wheel King Pin - 337KP20031
- 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 3/10" 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: 3/10"
- Bolster plate hole thickness: 3"
- Forged steel construction
- Plain finish
- Made in the USA
KP20031 Buyers Products 2 Inch Forged SAE Trailer King Pins With 5/16 Inch Bolster Plate - Weld On
Video of Buyers Products 2" Forged SAE Trailer King Pin with 5/16" 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 - 337KP20031 Review
Speaker 1: Today we're taking a look at a two-inch forged SAE trailer King Pin. This trailer King Pin provides strength and reliability in coupling your fifth wheel. It's forged from AISI 8630 steel, and heat treated to maintain a hardness of 302-363 BHN, and 150,000 PSI in ultimate strength. Now the King Pin features a five-sixteenth inch thick bolster plate, so the five-sixteenth inch measurement is measured from the bottom of this plate here to the top of that lip, so that portion right there is five-sixteenths of an inch.Again, we're looking at a forged steel construction with a plain finish. This is a weld-on installation. The overall diameter measuring edge to edge going in this direction, that gives us a measurement of eight inches.
From very bottom to very top, so I'm going to place that flat edge on there, then I'm going to measure up to it. That's four and one-quarter inches, and then from the bottom to the bottom of the top plate, so measuring this space right here, that measures three and five-eighths inches.Now this portion, that has a diameter of 2 and 13/16 inches. This section right here has a diameter of two inches, and at the very base it has a diameter of three inches. Again, nice durable forged steel construction, and the product's made in the USA.That's going to do it for today's look at the two-inch forged SAE trailer King Pin.
Customer Reviews
Buyers Products 2" Forged SAE Trailer King Pin with 5/16" Bolster Plate - Weld On - 337KP20031
Average Customer Rating: 4.8 out of 5 stars (62 Customer Reviews)
by: Gary 02/16/2023
Great thanks
by: Juliana05/06/2022
Good product and customer service is excellent to deal with!!
by: Dewayne 08/30/2020
Good job
by: Maria 12/13/2020
by: Trenton12/24/2020
Fast good service
by: Jerry 02/01/2023
by: David 01/17/2022
by: Shawn 01/13/2022
by: Christopher 03/23/2023
Arrived quickly. Product is exactly what I needed
by: Eric 03/18/2024
Exactly what we needed, makes repairs a breeze.
by: Christopher11/20/2023
Fits good. Works well for my applicati on
by: George 01/04/2024
Order was processed and shipped within an hour of my placing it! Arrived in excellent shape very quickly.
by: Glen 11/16/2023
PRODUCT AS EXPECTED VERY EASY TO ORDER AND RECIEVE
by: Chris 10/25/2023
Worked great.
by: Samuel 03/15/2023
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: Ken 09/16/2023
Part ordered was exactly what was needed and delivered on time without incident.
by: James 11/15/2021
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: Ken02/14/2022
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.
by: Billy04/17/2020
awesome,thats why I continue to order from yall,very fast shipping,i love it!
by: Erick 11/03/2022
Awesome service, parts came quick, and the right parts, I will be ordering again thanks etrailer.com
by: Jim s Welding11/11/2022
Great replacement for Holland pins
by: Rodell04/11/2022
etrailer is awesome!! The rep I dealt with knew EXAACTLY what I wanted. Very helpful, quick service and very polite. Big thumbs up!!
by: John 12/11/2020
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.
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See what our Experts say about this Buyers Products Fifth Wheel King Pin
- Replacement Kingpin for Part Number A52478-1 I may have a solution for you, but I don't see a lot of information about the part numbers that you provided; when I researched this the only thing I found says that the A52478-1 is a standard 2" kingpin that was used on military trailers. If this is the case then the Buyers Products # 337KP20031 will work for you. We do not have a 3-1/2" kingpin available, which would be the next largest size.
view full answer... - Solution for Extending King Pin to Gain Clearance Between 5th Wheel Trailer and Truck The Buyers Products 2" Forged SAE Trailer King Pin # 337KP20031 is a universal option that's designed to simply replace an existing king pin. It is not an extender but simply a standard king pin that would be welded to your trailer after the existing unit is removed/cut off. If you are needing to extend the king pin to raise the trailer's height where it connects to your truck then a better option will be to raise the entire pin box assembly. There should be adjustment holes on the pin...
view full answer... - Why Do King Pin Replacements Have Different Bolster ThicknessesKing 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... - Does Curt E16 5th Wheel Hitch Fit Curt Universal Base RailsThey 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...
Do you have a question about this Fifth Wheel King Pin?
Info for this part was:
Edited by:
Lindsey S
Installed by:
Cole B
Written by:
Kristina F
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