This Standard covers the recommended clearance hole sizes for #0 through 1.5 in. and M1.6 through M100 metric fasteners in three classes of clearance using a close-, normal-, and loose-fit category.
ASME B18.2.8-1999 (R2017)
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Clearance Holes for Bolts, Screws, and Studs
ASME International , 01/01/1999