Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools ANSI ① Spiral Fluted Tap Series for blind hole Overall Thread Thread + Neck Shank Size of Length oflengthlengthlengthdia.squaresquareLℓℓnDsKℓk ANSI ① ZELX FR Spiral Fluted Taps for High Speed Tapping ② Specification ■Spiral fluted tap applicable for such high speed Coating tapping as 15m/min to 25m/min. Under low tapping speed, poor chip shape and poor chip ③ ejection may occur and cause tapping troubles. Recommended Tapping Speed depending on Materials Low carbon steels Medium carbon steels 低炭素鋼 中炭素鋼 15〜25 15〜25 ④ (m/min) (m/min) TYPE:1 TYPE:2 ⑤ ⑥ TYPE:3 TYPE:4 ⑦ Segment:1D Size Class Code Chamfer L(inch) ℓ(inch) ℓn(inch) Ds(inch) K(inch) ℓk(inch) No. offlutes TYPE For Unified Threads ⑧ No.4-40UNC GH2 Y84401 2.5P 1.875 0.236 0.562 0.141 0.11 0.187 3 1 No.5-40UNC GH2 Y84403 2.5P 1.937 0.236 0.625 0.141 0.11 0.187 3 1 No.6-32UNC GH3 Y84405 2.5P 2 0.276 0.687 0.141 0.11 0.187 3 1 No.8-32UNC GH3 Y84407 2.5P 2.125 0.276 0.75 0.168 0.131 0.25 3 1 ⑨ No.10-24UNC GH3 Y84409 2.5P 2.375 0.354 0.875 0.194 0.152 0.25 3 1No.10-32UNFGH3Y844102.5P2.3750.2760.8750.1940.1520.2531 1/4-20UNC GH3 Y84413 2.5P 2.5 0.433 1 0.255 0.191 0.312 3 2 1/4-28UNF GH3 Y84414 2.5P 2.5 0.354 1 0.255 0.191 0.312 3 2 5/16-18UNC GH3 Y84415 2.5P 2.718 0.472 1.125 0.318 0.238 0.375 3 3 ⑩ 5/16-24UNF GH3 Y84416 2.5P 2.718 0.394 1.125 0.318 0.238 0.375 3 3 3/8-16UNC GH3 Y84417 2.5P 2.937 0.551 1.25 0.381 0.286 0.437 3 3 3/8-24UNF GH3 Y84418 2.5P 2.937 0.394 1.25 0.381 0.286 0.437 3 3 7/16-14UNC GH3 Y84419 2.5P 3.156 0.591 - 0.323 0.242 0.406 3 4 7/16-20UNF GH3 Y84420 2.5P 3.156 0.472 - 0.323 0.242 0.406 3 4 ⑪ 1/2-13UNC GH3 Y84421 2.5P 3.375 0.63 - 0.367 0.275 0.437 3 4 1/2-20UNF GH3 Y84422 2.5P 3.375 0.472 - 0.367 0.275 0.437 3 4 5/8-11UNC GH3 Y84425 2.5P 3.812 0.748 - 0.48 0.36 0.562 3 4 ANSI ①-177 ※ This product is different from JIS products in shape and dimensions, please be careful when using.