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 PL1 Hand Taps for Plastics ② Specification <2D ③ Nitride Recommended Tapping Speeds depending on Materials Thermosetting plastic 熱硬化性プラスチック 5〜10 ④ (m/min) Product Features ●The PL1 is a tap for threading thermosetting resin that is exceptionally difficult to machine among the synthetic resin. These plastics have low thermal conductivity and concentrate the heat at the cutting edge. Tool abrasion is severe. The material ⑤ tends to shrink when cutting an internal thread. The PL1 tap is designed to cut slightly oversize to allow for the shrinkage.A nitriding treatment is applied for better tool life. Comparison of accuracy between a HT and a PL1 ⑥ 0 ⑦ ⑧ 0 ⑨ ⑩ ⑪ JIS ④-117