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 Overall Thread Thread + Neck Shank Shank Size of Length oflengthlengthlengthlengthdia.squaresquareLℓℓnℓsDsKℓk⑥ DIN Size Class Code Chamfer L (mm) ℓ(mm) ℓn(mm) ℓs(mm) Ds(mm) K(mm) ℓk(mm) Lobe TYPEM16 × 1.5ISO2XRM016OBOCTB2P10018-511291283 ① M18 × 1.5 ISO2X RM018OBOCTP 4P 110 20 - 56 14 11 14 8 3 M18 × 1.5 ISO2X RM018OBOCTB 2P 110 20 - 56 14 11 14 8 3 M20 × 1.5 ISO2X RM020OBOCTP 4P 125 20 - 64 16 12 15 8 3 M20 × 1.5 ISO2X RM020OBOCTB 2P 125 20 - 64 16 12 15 8 3 ② Number of oil grooves: M 6 = 5, M8 = 6, M10 and larger = 8 For M6 and smaller, external centers of 2 thread chamfer taps are removed. ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ DIN ※ This product is different from JIS products in shape and dimensions, please be careful when using. ⑥-12