⑧ Pipe Tap Series Overall length L Thread length ℓ Shank dia. Ds Size of square K Length of square ℓk ANSI ANSI NPT-CI Spiral Fluted Taps (for blind hole) ① Hand Taps for American Taper Pipe Threads for Cast Irons Spiral Fluted Taps (for through hole) ② Specification ■Suitable for hard and abrasive materials such as cast irons. Spiral Pointed Taps (for through hole) Nitride ③ Recommended Tapping Speed depending on Materials Cast irons Ductile cast irons 鋳鉄 強靱鋳鉄 〜 5 〜 5 Hand Taps ( m / min ) ( m / min ) ④ TYPE:1 TYPE:2 Cemented Carbide Taps ⑤ Projection Projection Roll Taps Segment:1G ⑥ L ℓ Projection Ds K ℓk No. of Size Class Code Chamfer TYPE (inch) (inch) (inch) (inch) (inch) (inch) flutes For American Pipe Threads 1/8-27 NPT ANSI G Y83201 3P 2.125 0.75 0.312 0.437 0.328 0.375 4 1 1/8-27 NPT ANSI G Y83202 3P 2.125 0.75 0.312 0.312 0.234 0.375 4 2 Special Thread Taps Simple Inspection Tools ⑦ 1/4-18 NPT ANSI G Y83203 3P 2.437 1.062 0.459 0.562 0.421 0.437 4 1 3/8-18 NPT ANSI G Y83204 3P 2.562 1.062 0.454 0.7 0.531 0.5 4 1 1/2-14 NPT ANSI G Y83205 3P 3.125 1.375 0.579 0.687 0.515 0.625 4 2 3/4-14 NPT ANSI G Y83206 3P 3.25 1.375 0.565 0.906 0.679 0.687 5 2 Pipe Taps 1 -11 1/2 NPT ANSI G Y83207 3P 3.75 1.75 0.678 1.125 0.843 0.812 5 2 ⑧ 1 1/4-11 1/2 NPT ANSI G Y83208 3P 4 1.75 0.686 1.312 0.984 0.937 5 2 1 1/2-11 1/2 NPT ANSI G Y83209 3P 4.25 1.75 0.699 1.5 1.125 1 7 2 2 -11 1/2 NPT ANSI G Y83210 3P 4.5 1.75 0.667 1.875 1.406 1.125 7 2 Thread Mills Premium Thread Mills ⑨ Dies ⑩ Center Drills Centering Tools ⑪ ANSI ⑧-83 ※ This product is different from JIS products in shape and dimensions, please be careful when using.