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 JIS ④ Hand Tap Series Overall Thread Thread + Neck Shank Shank Size of Length oflengthlengthlengthlengthdia.squaresquareLℓℓnℓsDsKℓk JIS ① HT LH Hand Taps for Left Hand Threads ② Specification ■The HT LH is a hand tap for left thread tapping. Left hand ③ Recommended Tapping Speeds depending on Materials Low carbon steels Medium carbon steels High carbon steels 低炭素鋼 中炭素鋼 高炭素鋼 5〜10 5〜10 5〜10 ④ (m/min) (m/min) (m/min) TYPE:1 TYPE:2 ⑤ TYPE:3 TYPE:4 ⑥ ⑦ TYPE:5 TYPE:6 ⑧ TYPE:7 TYPE:8 ⑨ ⑩ TYPE:9 TYPE:10 ⑪ JIS ④-63