Tapered Roller Bearing Cup – Single Cup, 3.5000 in OD, 0.8125 in Width, Steel Material or 88.900×20.6375 mm Key Dimensions: Cup Outer Diameter (D): 88.900 mm / 3.500 inches Cup Width (C): 20.6375 mm / 0.8125 inches (For full assembly dimensions, refer to the HM803149/HM803110 bearing set) Performance & Features: Precision-ground raceways for quiet, smooth operation Heat-treated steel enhances fatigue strength and durability Engineered for high-load capacity, both axial and radial Interchangeable with other brands (Timken, NTN, etc., based on dimensional equivalence) Complies with ISO and ABMA standards Typical Applications: Heavy-duty trucks and trailers Agricultural and construction equipment Industrial gearboxes and transmissions Automotive differential and axle systems