Pipe Tap Series Overall length L Thread length ℓ Shank dia. Ds Size of square K Length of square ℓk ⑧ ANSI ANSI NPTF-CI Spiral Fluted Taps (for blind hole) ① Hand Taps for American Dryseal 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 Segment:1G Roll Taps ⑥ L ℓ Projection Ds K ℓk No. of Size Class Code Chamfer TYPE (inch) (inch) (inch) (inch) (inch) (inch) flutes For Dryseal American Pipe Threads 1/8-27 NPTF ANSI G Y83226 3P 2.125 0.75 0.312 0.437 0.328 0.375 4 1 1/8-27 NPTF ANSI G Y83227 3P 2.125 0.75 0.312 0.312 0.234 0.375 4 2 Special Thread Taps Simple Inspection Tools 1/4-18 NPTF ANSI G Y83228 3P 2.437 1.062 0.459 0.562 0.421 0.437 4 1 ⑦ 3/8-18 NPTF ANSI G Y83229 3P 2.562 1.062 0.454 0.7 0.531 0.5 4 1 1/2-14 NPTF ANSI G Y83230 3P 3.125 1.375 0.579 0.687 0.515 0.625 4 2 3/4-14 NPTF ANSI G Y83231 3P 3.25 1.375 0.565 0.906 0.679 0.687 5 2 1 -11 1/2 NPTF ANSI G Y83232 3P 3.75 1.75 0.678 1.125 0.843 0.812 5 2 Pipe Taps ⑧ 1 1/4-11 1/2 NPTF ANSI G Y83233 3P 4 1.75 0.686 1.312 0.984 0.937 5 2 1 1/2-11 1/2 NPTF ANSI G Y83234 3P 4.25 1.75 0.699 1.5 1.125 1 7 2 2 -11 1/2 NPTF ANSI G Y83235 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 ※ This product is different from JIS products in shape and dimensions, please be careful when using. ⑧-94