Pipe Tap Overall Thread Shank Size of Length of length length dia. square square L ℓ Ds K ℓk Spiral Fluted Taps (for blind hole) ZELX SS NPT Taps for American Taper Pipe Threads Spiral Fluted Taps (for through hole) Specification ■Suitable for tapping stainless steels, chrome steels and E chrome molybdenum steels. Oxide NPT 3/4 ~ Spiral Pointed Taps (for through hole) Recommended Tapping Speed depending on Materials ow carbon steels Alloy steels Stainless steels 5 5 5 For icon explanation, refer to P.50 Hand Taps TYPE:1 TYPE:2 Cemented Carbide Taps Segment:1H Roll Taps Size Class Code Chamfer L ℓ Projection Ds K ℓk No. of Type (inch) (inch) (inch) (inch) (inch) (inch) flutes For American Pipe Threads NPT 1/16-27 ANSI G Y83640 2.5P 2.125 0.687 0.312 0.312 0.234 0.375 4 1 Y83641 0.437 0.328 1 Pipe Taps Simple Inspection Tools NPT 1/8-27 ANSI G 2.5P 2.125 0.75 0.312 0.375 4 Y83642 0.312 0.234 2 NPT 1/4-18 ANSI G Y83643 2.5P 2.437 1.062 0.459 0.562 0.421 0.437 4 1 NPT 3/8-18 ANSI G Y83644 2.5P 2.562 1.062 0.454 0.7 0.531 0.5 4 1 NPT 1/2-14 ANSI G Y83645 2.5P 3.125 1.375 0.579 0.687 0.515 0.625 4 2 NPT 3/4-14 ANSI G Y83646 2.5P 3.25 1.375 0.565 0.906 0.679 0.687 4 2 NPT 1-11.5 ANSI G Y83647 2.5P 3.75 1.75 0.678 1.125 0.843 0.812 4 2 Thread Mills Dies Center Drills Centering Tools ANSI Pipe-1 302