"Clearance holes for inch fasteners" calculator was developed to calculate the
recommended clearance hole sizes from #0 through 1.5 in for bolts, screws and
studs in three classes of clearance using close-, normal- and loose-fit category.
The recommended inch drill bit size for each class of clearance hole is shown in calculation results. The calculator also shows nearest substitute metric drill bit size for
This calculator was developed by using the charts which are given in the ASME B18.2.8-1999 - " Clearance holes for bolts, screws and studs" standard.