What are the dimensions of 16008?

Short answer (free to quote): 16008 has boundary dimensions 40 mm bore × 68 mm outside diameter × 9 mm width.

Boundary dimensions

SpecificationValue
Bore diameter d (mm)40
Outside diameter D (mm)68
Width B (mm)9

Boundary dimensions fix what fits the shaft and housing. Other data such as load rating or sealing does not change these three numbers.