Printable Tap Drill Chart
This 1-page tap drill chart is for machinists, metalworkers, and anyone drilling holes before tapping threads. It lists 75% thread drill sizes in a simple table with three columns: Thread, Tap drill, and Decimal (in). Example rows include #4-40 with #43 and 0.089, #6-32 with #36 and 0.1065, and #8-32 with #29 and 0.136.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 63 KB
Free for personal, family and classroom use.
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Use the chart to match the thread size to the correct tap drill and decimal size before you start drilling. Keep it near the drill press, bench, or tapping setup for fast reference while working through common thread sizes.
Good for
- Select tap drills for common thread sizes
- Check decimal sizes before drilling
- Keep by the drill press for quick reference
Tip: Print on cardstock and laminate it for use near coolant, chips, and oil.
4 files · PDF, XLSX, DOCX
Get every sheet: Machinist Reference Charts
This sheet plus 3 more in one download, with the editable Excel and Word files. Printable machinist reference set: tap drill and clearance hole chart (inch and metric), NPT pipe tap chart, number and letter drill decimal chart and a thread identification worksheet.
$3.00 USD, one-time 4 files · about $0.75 each
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