Printable Tap Drill Chart
This one-page tap drill chart is for anyone working with standard drill sizes and tapped holes. It lists common thread sizes in a simple table with three columns: Thread, Tap drill, and Decimal (in). Rows include examples like #4-40 UNC with #43 and 0.089, #6-32 UNC with #36 and 0.1065, and #8-32 UNC with #29 and 0.136.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 99 KB
Free for personal, family and classroom use.
Use it to match a thread to the drill size before tapping. Keep the sheet near a drill press, bench, or parts drawer so you can check sizes quickly while laying out holes, selecting bits, or confirming decimal drill dimensions.
Good for
- Match tap drill size to thread
- Check decimal drill sizes fast
- Keep near drill press or bench
Tip: Print at actual size and keep it with your drill index for quick checks.
4 files · PDF, XLSX
Get every sheet: Drill Size Charts
This sheet plus 3 more in one download, with the editable Excel files. Printable drill charts: number and letter drill sizes with decimal and metric equivalents, fractional sizes to 1/2″, a tap drill chart for UNC, UNF and metric threads, and clearance hole sizes — workshop wall format.
$3.00 USD, one-time 4 files · about $0.75 each
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Printable Number Drill Size Chart
Printable Letter and Fractional Drill Size Chart
Printable Clearance Hole Chart