Related Resources: mechanical-tolerances

Metric Clearance Holes and Tolerances per. ASME B18.2.8-1999, R2010

Tolerances, Engineering Design & Limits & Fits

Clearance Holes and Tolerances for Metric Size Fasteners per. ASME B18.2.8-1999, R2010

The recommended drill and hole sizes for metric fasteners are tabulated in this table calculator. The minimum recommended hole is the drill size and the maximum recommended hole size is based on standard tolerances. The hole sizes for metric fasteners are in agreement with ISO 273, Fasteners-Clearance Holes for Bolts and Screws, except that ISO 273 covers fastener sizes M1 through M150.

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