Below are a few simple explanations and general guidelines to the use of NPT (National Pipe Taper) thread gages. As always when in doubt refer to the ANSI/ASME referenced specifications like ASME …

Choose from our selection of NPT pipe thread gauges in a wide range of styles and sizes. Same and Next Day Delivery.

Dec 30, 2025 · Get the complete NPT thread dimensions with our definitive chart. Learn to measure, identify, and install tapered pipe threads for leak-proof connections.

Thread Check’s expert sales engineers can assist your inquiries regarding the proper use of NPT gauges. Thread Check’s expert sales and engineering staff are pleased to assist with any gauging or …

Even experienced users who have used Straight Thread gages may be confused by the use of tapered pipe thread gages. Please see see the link below for a PDF to explain the basics of NPT and NPTF …

Learn how to inspect NPT taper pipe threads using ASME B1.20.1-2013 standards. Understand gaging methods, Go/No-Go rules, L1 plug/ring gages, and inspection best practices for accurate thread …

NPT thread gauges supplier, NPT thread ring gauges and plug gauges, from 1/8"-6" in stock. Each NPT thread gauge 100% calibrated with quality assurance.

Root Check Plug & Ring gages the major diameter of the internal thread and minor diameter of the external thread (root truncation) and is used in relation to the L1 plug or ring.

Choose from our selection of NPT gauges, including pressure and vacuum gauges, plug gauges for inside diameters, and more. Same and Next Day Delivery.

Regal’s plug and ring pipe thread gages are made from hardened tool steel and conform to precise class X tolerances and ANSI Standards. Pipe thread gages for NPT threads are available from 1/16 …