Description
Holland KPT809B heavy‑duty trailer kingpin
A 2-inch “mushroom style” kingpin designed for semi‑trailers
Welded into the trailer’s upper coupler plate (bolster plate)
Connects to the truck’s fifth wheel, forming the critical hitch point between tractor and trailer
Features
Heavy‑duty forged alloy steel construction (8630H) for durability and long service life
2-inch SAE standard kingpin size (industry standard for most trailers)
1/2″ bolster plate thickness for strength and load distribution
8 plug‑weld holes (≈0.53″) for secure installation into the trailer plate
Designed to meet or exceed SAE & TTMA standards for performance and safety
Applications
Semi‑trailers (dry van, flatbed, tanker, etc.)
Heavy‑duty trucking fleets
OEM trailer manufacturing and aftermarket replacement
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