Best King Pin For 5Th Wheel: Compare Weld-On Replacements

#1 · Best Overall

1. Buyers Products KP20050

• Weight: 13.2 lb

Best for: Half-inch bolster plate replacement.

Why it ranks #1: Its 2-inch SAE pin is forged from AISI 8630 steel, heat-treated to 302–363 BHN, and listed at 150,000 PSI ultimate strength.

Forged AISI 8630 steel, heat-treated to 302–363 BHN, gives the Buyers Products KP20050 a clearly specified strength profile for fifth-wheel coupling. Its 0.50-inch bolster-plate thickness makes it a candidate when a weld-on replacement needs that plate size, while the 2-inch SAE king pin identifies its coupling dimension.

The stated 150,000 PSI ultimate strength and heat-treated hardness speak to the pin’s load-bearing construction, while the forged AISI 8630 steel identifies its material. For installation planning, Buyers lists this model as weldable and specifies a 0.50-inch bolster plate, so the plate dimension is clear before fabrication. The 2-inch SAE king pin gives buyers a second key measurement to compare with their existing setup. The supplied components list includes the king pin itself.

Skip it if you need a 3/8-inch bolster plate; the ELSOON WA15 5050 lists that thickness instead.

Choose this Buyers Products pin when a weldable fifth-wheel replacement calls for a 2-inch SAE pin and 0.50-inch bolster plate. Its specified plate thickness is the key fit boundary; it is not the listed 3/8-inch configuration.

Listed on Amazon as: Buyers Products KP20050 Forged Trailer King Pin, 2-Inch, 0.50-Inch Bolster Plate Thickness, Weldable, Provide Strength And Reliability To Your Fifth Wheel, 5th Wheel Accessories , Black

#2 · Best Interchange Fit

2. National Drivetrain WA15-5050

• Weight: 14 lb

Best for: Broad interchange-number search.

Why it ranks #2: The weld-on WA15-5050 has a 2-inch collar, 3/8-inch plate, and an extensive interchange list including Dayton, Batco, Spicer, Mack, and Volvo.

A broad interchange list is the National Drivetrain pin’s defining practical feature: it names Dayton, Batco, Spicer, Standard Forge, Mack, and Volvo references. For parts buyers working from an existing number rather than a brand name, those cross-references can help narrow the search for a weld-on 5th-wheel replacement.

The listing specifies a 2-inch collar and 3/8-inch bolster plate, giving buyers two dimensions to compare with the existing kingpin before installation planning. Its weld-on description makes it a replacement for a welded setup, while the listed Dayton 11-0212, Batco 11-200, and Spicer 13101 references provide recognizable cross-checks. Further listed numbers include Mack 3889-KPT809F and Volvo 3948378. The supplied specifications identify the part number as WA15-5050.

Skip it if you require a listed steel grade and strength figure; Mytee Products' 0.38-inch weld-on pin specifies 8630 alloy steel and strength values.

This National Drivetrain option suits a buyer matching a WA15-5050-style weld-on pin through interchange numbers and the stated 2-inch collar, 3/8-inch plate. Its listing provides no steel-grade or strength figure for material-based selection.

Listed on Amazon as: KING PIN – WELD ON FOR 5TH WHEEL TRAILER – 2" COLLAR – 3/8" BOLSTER PLATE

#3 · Best Inspection Detail

3. Mytee Products King Pin

• Weight: 14 lb

Best for: Inspected alloy-steel weld-on pin.

Why it ranks #3: This weldable 8630-alloy-steel mushroom pin is made in the USA, Brinell-hardness checked, and magnetic-particle inspected; its listing cautions against off-road use.

Mytee Products specifies 8630 alloy steel, Brinell hardness checks, and magnetic-particle inspection for this weldable mushroom kingpin. Those material and inspection details give maintenance-minded buyers a more documented basis for choosing a 5th-wheel replacement, while the listed 0.38-inch groove diameter identifies a dimension to compare with the existing setup.

The stated approximate 150,000 PSI ultimate strength and 115 PSI yield strength provide load-related figures for specification review, and the 8630 alloy-steel material identifies the construction. Mytee also says every pin is Brinell hardness checked and magnetic-particle inspected, details that can inform a buyer’s quality-control review. Its weldable designation supports a welded installation workflow. The product is explicitly not for off-road use, a boundary that matters when the trailer’s operating environment is part of the decision.

Skip it if you operate off-road; Mytee explicitly excludes that use, while the WA15 5050 ELSOON listing describes harsh, long-term use.

Choose this Mytee pin when alloy-steel construction, inspection details, and weldability matter for an on-road fifth-wheel application. Its explicit off-road exclusion is a firm operating boundary, and its 0.38-inch groove diameter warrants dimension comparison.

Listed on Amazon as: Mytee Products Kingpin Weld On for 5th Wheel Trailer 0.38" Made in USA

#4

4. DETYI WA15 5050

• Weight: 14.8 lb

Best for: Cross-reference focused replacement.

Why it ranks #4: It lists WA15 5050 and several cross-compatible OEM numbers, includes installation hardware, and specifies welded installation; confirm its plate thickness for your trailer.

Cross-compatibility with several named OEM references distinguishes the DETYI WA15 5050 kingpin, including Dayton 11-0212, Batco 11-200, and Spicer 13101. That reference list can help replacement buyers identify a candidate across different part-number systems, while its 2-inch pin and 1/2-inch bolster-plate title specify the core dimensions.

DETYI identifies the pin as a direct WA15 5050 replacement and lists additional cross-references, including Standard 20BWPM698 and 20SIR700. Those identifiers help organize a parts search, but the listing also calls for verifying fitment to the specific trailer model. The product is described as engineered for welded installation, which points buyers toward a permanent installation workflow rather than a bolt-on change. Its carbon-steel material and included installation hardware are also stated in the specifications.

Skip it if you need a stated 150,000 PSI ultimate-strength figure; Buyers Products KP20050 lists that specification.

Consider DETYI when its WA15 5050 and cross-reference numbers match your replacement search and welded installation suits the trailer. Verify the specific model fit as the listing advises; the supplied details do not provide a strength figure.

Listed on Amazon as: WA15 5050 Fifth Wheel Kingpin 2" & 1/2" Bolster Plate Trailer King Pin

#5

5. ELSOON WA15 5050

Best for: WA15 3/8-inch plate replacement.

Why it ranks #5: The forged-steel WA15-style pin specifies a 2-inch collar and 3/8-inch bolster plate, making its dimensions clear for buyers matching that configuration.

A forged-steel WA15 5050 king pin pairs a 2-inch collar with a 3/8-inch bolster plate, giving replacement shoppers two useful dimensions up front. ELSOON identifies it for fifth-wheel trailers and heavy-duty towing applications, making those stated measurements central to deciding whether this pin suits a specific replacement need.

The forged alloy-steel construction is specified for durability in harsh, long-term use, while the WA15 5050 model designation narrows the replacement reference. Its 2-inch collar and 3/8-inch bolster plate provide concrete dimensions to compare against the trailer’s existing setup before installation. ELSOON describes it for fifth-wheel and gooseneck trailers, so buyers considering either application can use the stated compatibility as a starting point. The package listing specifies one king pin.

Skip it if you need a 0.50-inch bolster plate; Buyers Products KP20050 lists that thicker plate size.

This ELSOON is a fit to consider for a WA15 5050 replacement where the stated 2-inch collar and 3/8-inch plate match the trailer. Check those dimensions against the existing installation before committing to the weld-on work.

Listed on Amazon as: WA15 5050 Forged Steel Trailer King Pin with 2" Collar and 3/8" Bolster Plate Compatible with 5th Wheel Trailers for Enhanced Towing Stability and Load Capacity

#6

6. YuShaTra WA15 5050

Best for: WA15 heavy-duty replacement.

Why it ranks #6: This replacement lists a 2-inch collar, 3/8-inch plate, and interchange numbers including Dayton 11-0212 and Batco 11-200, though material details are limited.

A 2-inch collar and 3/8-inch bolster plate define this YuShaTra WA15 5050 replacement, whose fitment list spans Dayton, Batco, Spicer, Standard, and Mack references. That combination helps buyers compare both key dimensions and familiar part numbers before planning a replacement for a fifth-wheel trailer.

YuShaTra describes high-strength steel with wear resistance for heavy-duty applications, while the compact fixed structure is presented as helping prevent accidental decoupling. Those claims connect the material and connection design to demanding towing use. The listed 2-inch collar and 3/8-inch plate offer concrete measurements for installation planning. Its replacement references include Dayton 11 0212, Batco 11 200, and Spicer 13101, plus Standard and Mack numbers, helping organize a cross-reference check.

Skip it if you need installation hardware listed; DETYI's WA15 5050 replacement specifies installation hardware in its included components.

This YuShaTra suits a buyer seeking a WA15 5050 replacement with listed Dayton, Batco, Spicer, Standard, and Mack references. Compare its 2-inch collar and 3/8-inch plate with the trailer; the supplied components field lists none.

Listed on Amazon as: WA15 5050 Trailer Kingpin, High Strength Fifth Wheel Kingpin with 2 Inch Collar and 3/8 Inch Bolster Plate, Heavy Duty Steel King Pin for 5th Wheel Trailer Hitch, Replacement

#7

7. Keenso Trailer Kingpin

Best for: Large-trailer steel replacement.

Why it ranks #7: The listing specifies a 2-inch collar and 3/8-inch plate and identifies Parts 11-0212 and Batco 11-200 as replacements, but gives few further specifications.

Keenso highlights a high-strength steel kingpin with a 2-inch collar and 3/8-inch bolster plate for large trailers and heavy loads. Its stated replacement references to Parts 11 0212 and Batco 11 200 give buyers two specific numbers to compare, while the compact dimensions clarify the listed attachment configuration.

The high-strength steel construction is presented for durability in challenging conditions, and the listing describes a stable structure intended to prevent accidental decoupling. Together, those features address material and connection concerns for heavy-load towing. The 2-inch collar and 3/8-inch bolster plate specify the physical configuration, which buyers can compare during replacement planning. Keenso names Parts 11 0212 and Batco 11 200 as replacement references, but provides a narrower cross-reference list than some WA15 5050 listings.

Skip it if you need broader named cross-references; National Drivetrain's WA15-5050 listing also names Spicer, Standard Forge, Mack, and Volvo references.

Keenso is worth considering for a large-trailer replacement when its 2-inch collar, 3/8-inch plate, and two named reference numbers match the job. Buyers needing more cross-reference identifiers will find the supplied list limited.

Listed on Amazon as: Keenso Trailer Kingpin, High Strength Steel, 2 Inch Collar, 5th Wheel Kingpin for Large Trailers and Heavy Loads

#8

8. ChuyTrading WA15 5050

• Weight: 12.54 lb

Best for: WA15 dimension-matched replacement.

Why it ranks #8: It lists a 2-inch collar, 3/8-inch plate, and WA15 5050 interchange references, but provides less material and strength detail than higher-ranked options.

ChuyTrading pairs a WA15 5050 designation with a 2-inch collar and 3/8-inch bolster plate, giving replacement buyers a defined configuration to assess. Its listing also names Dayton 11 0212 and Batco 11 200, plus Spicer, Standard, and Mack references, for a cross-reference-led search.

The product description identifies high-strength steel and wear resistance for demanding towing conditions, while its secure-towing description ties the 2-inch collar and 3/8-inch plate to a stable connection. Those stated dimensions help buyers compare the pin with an existing installation before scheduling replacement work. The listed interchange references include Dayton, Batco, Spicer, Standard, and Mack numbers. Its specifications give an item weight of 12.54 pounds, a practical handling detail when moving the part into position.

Skip it if you require a stated ultimate-strength figure; Buyers Products KP20050 lists 150,000 PSI ultimate strength.

Consider ChuyTrading when a WA15 5050 pin with the stated collar, plate, and cross-references suits the trailer. The listed weight may help handling plans, but the supplied details give no strength rating or hardness figure.

Listed on Amazon as: Trailer Kingpin WA15 5050 Fifth Wheel Kingpin with 2 Inch Collar and 3/8 Inch Bolster Plate, High Strength Steel Replacement for Dayton Parts 11 0212 Batco 11 200 for Heavy Duty Tr

#9

9. BowyTrading WA15 5050

Best for: Wide WA15 interchange coverage.

Why it ranks #9: The listed 2-inch collar, 3/8-inch plate, and Dayton and Batco replacement numbers suit a matching WA15 setup, but documentation is limited.

BowyTrading’s WA15 5050 listing includes an unusually broad supplied interchange set, from Dayton 11 0212 and Batco 11 200 to Spicer, Standard, Mack, and Sirco references. That breadth can help parts buyers compare an existing number, alongside its stated 2-inch collar and 3/8-inch bolster plate.

The description identifies forged high-strength steel and wear resistance for demanding towing applications, then pairs those material claims with a secure-towing design. Its 2-inch collar and 3/8-inch plate are the key dimensions to check against the trailer’s existing configuration. The interchange list extends beyond the title’s Dayton and Batco numbers to include Spicer 13101, Standard 20BWPM698 and 20SIR700, Mack 3889 KPT809F, and other references, supporting a more extensive parts-number comparison.

Skip it if you need a stated steel grade and strength figure; Mytee Products' weld-on pin lists 8630 alloy steel and strength values.

BowyTrading suits a buyer using interchange numbers to identify a WA15 5050 replacement with a specified 2-inch collar and 3/8-inch plate. Its broad reference list is useful for comparison, though no steel grade or rating is supplied.

Listed on Amazon as: Trailer Kingpin WA15 5050 Fifth Wheel Kingpin with 2-Inch Collar and 3/8-Inch Bolster Plate, High-Strength Steel Replacement for Dayton Parts 11 0212, Batco 11 200

#10

10. Hulex Supplies WA15 5050

• Weight: 12.54 lb

Best for: WA15 pin for heavy trailers.

Why it ranks #10: This WA15-style replacement lists a 2-inch collar and 3/8-inch plate, but its stated load-bearing claims lack specific material or strength figures.

Hulex Supplies specifies a high-strength steel WA15 5050 pin with a 2-inch collar and 3/8-inch bolster plate, aimed at heavy-trailer towing. Its listed Dayton, Batco, Spicer, Standard, and Mack replacement references offer a parts-search route while those dimensions give buyers concrete fit checks.

The listing describes a compact, stable fixed structure intended to minimize play and prevent accidental decoupling, connecting its design to a secure trailer connection. High-strength steel and the stated 2-inch collar and 3/8-inch plate define the material and physical configuration for replacement planning. Its fitment list names Dayton 11 0212, Batco 11 200, Spicer 13101, Standard references, and Mack 3889 KPT809F. The supplied specifications also list the item weight as 12.54 pounds.

Skip it if you need a numerical ultimate-strength figure; Buyers Products KP20050 lists 150,000 PSI ultimate strength.

Hulex Supplies fits buyers seeking a WA15 5050-style replacement for a heavy trailer when the stated dimensions and cross-references align. The stable-connection description is relevant, but the listing supplies no steel grade or numerical load rating.

Listed on Amazon as: Trailer Kingpin WA15 5050 Fifth Wheel Kingpin with 2 Inch Collar and 3/8 Inch Bolster Plate, High Strength Steel Replacement for Dayton Parts 11 0212, Batco 11 200, Mack and Freigh