Spiral Pointed Tap Overall Thread Thread+Neck Shank Size of Length of length length length dia. square square L ℓ ℓn Ds K ℓk Spiral Fluted Taps (for blind hole) ZELX NI PO Spiral Pointed Taps for Nickel Base Alloys Spiral Fluted Taps (for through hole) Specification ■ZELX NI PO is the spiral point tap for nickel base alloys which, with nickel as main composition, have much higher Nitride Oxide corrosion resistance and much higher heat resistance than steels. Spiral Pointed Taps (for through hole) Recommended Tapping Speed depending on Materials ickel base alloys 5〜10 (m/min) For icon explanation, refer to P.50 Hand Taps TYPE:1 TYPE:2 Cemented Carbide Taps Roll Taps TYPE:3e TYPE:4 Pipe Taps Simple Inspection Tools Segment:1F Size Class Code Chamfer L ℓ ℓn Ds K ℓk No. of Type (inch) (inch) (inch) (inch) (inch) (inch) flutes For Metric threads M2.5 × 0.45 D3 Y87320 4.5P 1.812 0.295 0.5 0.141 0.11 0.187 2 1 M3 × 0.5 D3 Y87321 4.5P 1.937 0.374 0.625 0.141 0.11 0.187 3 1 Thread Mills M3.5 × 0.6 D4 Y87322 4.5P 2 0.413 0.687 0.141 0.11 0.187 3 1 M4 × 0.7 D4 Y87323 4.5P 2.125 0.453 0.75 0.168 0.131 0.25 3 1 M5 × 0.8 D4 Y87324 4.5P 2.375 0.531 0.875 0.194 0.152 0.25 3 1 M6 × 1 D5 Y87325 4.5P 2.5 0.591 1 0.255 0.191 0.312 3 2 M7 × 1 D5 Y87326 4.5P 2.718 0.669 1.125 0.318 0.238 0.375 3 3 Dies M8 × 1.25 D5 Y87328 4.5P 2.718 0.669 1.125 0.318 0.238 0.375 3 3 M8 × 1 D5 Y87327 4.5P 2.718 0.669 1.125 0.318 0.238 0.375 3 3 M10 × 1.5 D6 Y87330 4.5P 2.937 0.748 1.25 0.381 0.286 0.437 3 3 M10 × 1.25 D5 Y87329 4.5P 2.937 0.748 1.25 0.381 0.286 0.437 3 3 Center Drills M12 × 1.75 D6 Y87332 4.5P 3.375 0.984 - 0.367 0.275 0.437 3 4 M12 × 1.25 D5 Y87331 4.5P 3.375 0.984 - 0.367 0.275 0.437 3 4 For Unified Threads No.2-56UNC GH2 Y85523 4.5P 1.75 0.256 0.437 0.141 0.11 0.187 2 1 Centering Tools GH2 Y85501 No.4-40UNC GH3 Y85502 4.5P 1.875 0.335 0.562 0.141 0.11 0.187 2 1 GH4 Y85504 No.5-40UNC GH2 Y85503 4.5P 1.937 0.374 0.625 0.141 0.11 0.187 3 1 ANSI PO-19 246