They do NOT have NPT threads as stated in both the description and the packaging. They are provided with NPS threads. The NPT thread is tapered to prevent air leakage through the thread. These fittings WILL NOT WORK for 90% of pneumatic systems as most pneumatic tools, solenoids, fittings and cylinders do not use NPS. They only screw 2 threads onto anything with true NPT threads and will endanger or destroy the device they screw into. DO NOT purchase these mislabeled fittings unless you know for sure you need NPS (NOT TAPERED) threads.
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