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NPT Pipe Thread Identifier, 1/8 NPT to 3/4 NPT

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What size is that NPT fitting you're trying to replace? What about that pipe thread fitting you just received -- is it the size you ordered? How can you tell 1/8 NPT from 1/4 NPT without a micrometer or a trip to the hardware store?

Thread Detective® to the rescue!

The NPT Pipe Thread Thread Detective has 5 special steel fittings, each with a different NPT (National Pipe Thread, tapered pipe) thread size. Each size has both male and female threads so you can identify male fittings and female ports. They are all strung together on a wire lanyard. One end of the lanyard has a small metal tag with an 85mm (3 3/8") ruler with both metric and SAE markings. The fittings are separated by shatterproof plastic dividers, and each fitting has its thread size permanently printed in bold numbers. Loops at both ends of the lanyard let you hang it near your workbench or in the trailer. The extra-long lanyard lets you reach into tight places when removing the mystery fitting isn't practical.

This NPT kit covers the most common sizes found in automotive and aircraft plumbing:
1/8-27, 1/4-18, 3/8-18, 1/2-14, and 3/4-14 NPT

Part No.
Stock Status

Condition: New

In Stock