* some of manufacturing of components & assembly processes could need also Jigs or fixtures at designated stages
** If there's more information about this case , we can provide more study ; as below " for example only :
***When I specify hole diameter & the bar /shaft diameter ; the fitting should be classified also " clearance ; transient or interference fit"
****The grade of gauges could differ accordingly " Grade H of Hole & h or g for the bar/shaft ; anyhow the allowance between both maybe need more study.