XA351A0U-L-P
Fifth Wheel Top Plate, Holland
SAF-Holland

As a critical coupling interface in heavy-duty trucking, the top plate assembly provides the mating surface for the kingpin and saddle, enabling controlled rotation and load transfer between tractor and trailer. Engineered for Holland fifth-wheel configurations, it supports uniform distribution of vertical and dynamic loads, reducing localized wear and extending the service life of mating components. The robust construction resists impact and shear forces encountered during rapid acceleration, highway coasting, and heavy braking, helping maintain precise alignment and reliable articulation across articulated joints. When installed with proper mounting hardware, surface flatness and clamping tolerance promote consistent hitch engagement, minimize hitch slack, and improve overall coupling reliability across fleet operations. This part is cataloged under VMRS code 059-001-001, which identifies the fifth wheel top plate family for maintenance planning, procurement, and interchangeable parts management. Cross-references to alternative part numbers, such as JOS JSK37HSL, support compatibility considerations for mixed fleets or non-Holland configurations. Within the category context of 42763, this component plays a pivotal role in safety-critical towing, GVW management, and predictable ride quality on long-haul and regional applications. Its design supports routine inspection cycles, easy replacement, and consistent performance under diverse load profiles and road conditions.