Enter measurements to identify the most likely pipe thread size
The Pipe Thread Size Identifier Tool is designed to help you accurately determine the correct pipe thread size and type for plumbing, mechanical, and industrial applications. Incorrect thread identification is one of the most common causes of leaks, poor sealing, and damaged fittings.
This tool simplifies the process of identifying pipe threads, helping you select compatible fittings and avoid costly mistakes.
Pipe threads may appear similar but differ significantly in size, pitch, and sealing method. Using the wrong thread type can result in:
Leaking joints
Cross-threading and damaged fittings
Reduced pressure performance
Premature system failure
Time-consuming rework and added costs
Correct identification ensures a secure, leak-free connection and long-term system reliability.
The tool helps identify pipe threads based on key characteristics you can easily measure or observe.
You simply input details such as:
Measured outside or inside diameter
Thread pitch (threads per inch or mm)
Male or female thread
Tapered or parallel thread
The tool then identifies:
Likely pipe thread standard
Nominal pipe size
Compatible fitting types
BSPP (parallel)
BSPT (tapered)
Common in North America
Tapered sealing threads
Common in appliances and modern equipment
Used in specialist or high-pressure systems
The Pipe Thread Size Identifier Tool is ideal for:
Plumbers and heating engineers
Maintenance technicians
DIY homeowners
Mechanical and industrial engineers
Equipment installers
It’s suitable for both domestic and commercial systems.
✔ Reduces fitting errors
✔ Prevents leaks and rework
✔ Saves time on site
✔ Improves connection reliability
✔ Easy to use for professionals and DIY users
This tool is useful for:
Replacing taps, valves, and fittings
Identifying unknown pipe threads
Preventing cross-threading
Matching fittings during repairs
Maintenance and refurbishment projects
A pipe thread is a helical ridge on a pipe or fitting used to connect and seal piping components.
BSP threads use a 55-degree thread angle, while NPT uses a 60-degree angle. They are not directly interchangeable.
Measure the outside diameter (for male threads), count the number of threads per inch or measure pitch, and check whether the thread is tapered or parallel.
No. Mixing thread standards often causes leaks or damaged fittings. Always match the correct thread type.
This tool helps with identification, but for critical or high-pressure systems, physical thread gauges and professional verification are recommended.
Clean threads before measuring
Use calipers for diameter accuracy
Count threads carefully
Check taper visually or with measurement
Refer to manufacturer documentation where available
This tool provides guidance only. Pipe thread identification should be confirmed before installation, especially for high-pressure or safety-critical systems.
The Pipe Thread Size Identifier Tool takes the guesswork out of identifying pipe threads. By accurately determining thread size and type, you can ensure proper fitting selection, prevent leaks, and complete installations with confidence.
Use this tool to save time, reduce errors, and achieve professional-quality results.