⑥ Roll Tap Series Overall length L Thread length ℓ Thread + Neck length ℓn Shank length ℓs Shank dia. Ds Size of square K Length of square ℓk JIS R-Y Spiral Fluted Taps (for blind hole) ① JIS Roll Taps for Thin Soft Structural Steel Sheets Spiral Fluted Taps (for through hole) ② Specification ■For tapping general fasteners made from such 3 thin steel sheets as SPC and SPH, and from such soft steels as under SS400 and S20C. Spiral Pointed Taps (for through hole) ③ Recommended Tapping Speeds depending on Materials Low carbon steels 低炭素鋼 〜 5 Hand Taps ( m / min ) ④ TYPE:1 TYPE:2 Cemented Carbide Taps ⑤ Segment:1J Roll Taps L ℓ ℓn ℓs Ds K ℓk MSRP ⑥ Size Code Chamfer (mm) (mm) (mm) (mm) (mm) (mm) (mm) Lobe TYPE 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 Special Thread Taps Simple Inspection Tools 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 Pipe Taps M8 × 1.25 RY8.0N3 3P 70 18 - - 6.2 5 8 4 2 ¥1,960 ⑧ Number of oil grooves : non ※Please use CPR-Y for controlling of bored holes.(For CPR-Y, refer to product page ⑦-75) Thread Mills Premium Thread Mills ⑨ Dies ⑩ Center Drills Centering Tools ⑪ JIS ⑥-63 ※ = Specified Distribution Items. Made to order products.