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 ⑥ Roll Tap Series Overall Thread Thread + Neck Shank Shank Size of Length oflengthlengthlengthlengthdia.squaresquareLℓℓnℓsDsKℓk JIS ① R-Y Roll Taps for Thin Soft Structural Steel Sheets ② Specification 3 ■For tapping general fasteners made from suchthinsteelsheetsasSPCand SPH, and from such soft steels as under SS400 and S20C. ③ Recommended Tapping Speeds depending on Materials  Low carbon steels 低炭素鋼 〜5 ④ (m/min) TYPE:1 TYPE:2 ⑤ Segment:1J ⑥ Size Code Chamfer L(mm) ℓ (mm) ℓn(mm) ℓs(mm) Ds(mm) K(mm) ℓk(mm) Lobe TYPE MSRP For Metric Threads M2 × 0.4 RY2.0E3 3P 42 7 - 31 3 2.5 5 4 1 ¥1,390 M2.5 × 0.45 RY2.5F3 3P 44 8 - 33 3 2.5 5 4 1 ¥1,220 M2.6 × 0.45 RY2.6F3 3P 44 8 - 33 3 2.5 5 4 1 ¥1,220 ⑦ M3 × 0.5 RY3.0G3 3P 46 9 - 33 4 3.2 6 4 1 ¥1,100 M4 × 0.7 RY4.0I3 3P 52 11 - 36 5 4 7 4 1 ¥1,110 M5 × 0.8 RY5.0K3 3P 60 12 - 43 5.5 4.5 7 4 1 ¥1,210 M6 × 1 RY6.0M3 3P 62 15 - 44 6 4.5 7 4 1 ¥1,320 ⑧ M8 × 1.25 RY8.0N3 3P 70 18 - - 6.2 5 8 4 2 ¥1,960 Number of oil grooves : non ※Please use CPR-Y for controlling of bored holes.(For CPR-Y, refer to product page ⑦-75) ⑨ ⑩ ⑪ JIS ⑥-63 ※ = Specified Distribution Items. Made to order products.