Goliath 3/8" x 18 TPI NPSF Bottoming HSS | AIMS Industrial
Available
Pipe taps are much shorter than a similar size of regular hand tap, but the design features are the same. National Pipe Straight Fuel (Dryseal) is used for internal threads and an NPTF external thread can be screwed into it to provide both a satisfactory mechanical connection and hydraulic seal. A combination of a parallel and tapered thread would not appear to be ideal but it is widely used. Many quick disconnect couplers for example have the NPSF thread and are recommended by the manufacturer for use with NPT and NPTF, making it a reliable machine tap.
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1/8"mm threading die
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1/4"mm threading die
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1/2"mm threading die
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3/8"mm threading die
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3/4"mm threading die
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