Printable NPT Thread Reference Chart
This one-page Letter PDF is for anyone checking NPT pipe thread sizes, including installers, shop workers, and students. It lists NPS, threads per inch, and approximate tap drill sizes in a simple reference table. Example rows include 1/8 with 27 TPI and 11/32 in, 1/4 with 18 TPI and 7/16 in, and 3/8 with 18 TPI and 37/64 in. It also notes that NPT threads taper 1 in 16 on diameter and that thread sealant or tape should be used as specified.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 55 KB
Free for personal, family and classroom use.
Use it as a quick lookup before tapping, threading, or matching pipe fittings. Print it for a bench, toolbox, or job folder so the size and drill information is easy to check at a glance.
Good for
- Check NPT thread size before tapping
- Match pipe fittings to drill sizes
- Keep by the bench for fast reference
Tip: Print on heavy paper and keep it near the tap drill set for faster checks.
5 files · PDF, XLSX, DOCX
Get every sheet: NPS Pipe Size Chart Pack
This sheet plus 4 more in one download, with the editable Excel and Word files. Printable NPS pipe size chart (1/8–24 in, DN, OD, Schedule 10/40/80 wall and ID), steel weight table, an Excel pipe calculator, an NPT quick reference and a pipe takeoff sheet.
$7.00 USD, one-time 5 files · about $1.40 each
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