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This trailer axle bearing is specified as Bearing, 9-10KGD Inner 10K Outer on DX hubs - 387A - 6 / 48 each per sleeve/box. Use part number 387A when matching or reordering this component. It is intended for service, repair, or replacement work where the listed dimensions and application details match the trailer.
Designed for compatible axle bearings and seals applications. Match the bearing number and axle application; inspect the mating race and seal during service. Trailer parts that look similar can use different dimensions or ratings, so use the stamped part number and physical measurements as the final fitment check.
Inspect the related components for wear and compare every listed measurement with the part being replaced. Installation should follow the trailer or component manufacturer's procedures and applicable torque specifications.
Trailer Parts Plus supplies practical replacement axle bearings and seals for utility, cargo, boat, equipment, and commercial trailers. Need help confirming 387A? Have your axle rating, measurements, and existing part numbers ready so the correct match can be verified.