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Clearance Hole Calculator — Free Online Tool
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Clearance Hole Calculator

Calculate standard clearance hole drill diameters for bolts and screws

Engineering Standards (ASME B18.2.8):
• Close Fit: Used where precise alignment is needed with minimum play.
• Normal Fit: Standard general-purpose clearance for normal production.
• Loose Fit: Used for assembly allowance where alignment might vary.
Fastener Parameters

Calculation Results

⚠️ Clearance hole dimensions follow standard ASME guidelines. Always verify drill bit availability and material tolerances before machining parts.

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