① Spiral Fluted Tap Series for blind hole Overall length L Chamfer + full thread ℓt Thread length ℓ Thread + Neck ℓn length Shank length ℓs Shank dia. Ds Size of square K Length of square ℓk DIN SP-VA Spiral Fluted Taps (for blind hole) ① DIN Spiral Fluted Taps for Stainless Steels Spiral Fluted Taps (for through hole) ② Specification ■Most suitable for stainless steels, sticky and <2D tending to work-harden, as well as chrome steels and molybdenum steels, blind hole use. Spiral Pointed Taps (for through hole) Oxide ③ Recommended Tapping Speeds depending on Materials Low carbon steels Medium carbon steels High carbon steels Alloy steels Stainless steels 低炭素鋼 中炭素鋼 高炭素鋼 合金鋼 ステンレス鋼 〜 10 〜 10 〜 10 〜 10 〜 10 Hand Taps ( m / min ) ( m / min ) ( m / min ) ( m / min ) ( m / min ) ④ TYPE:1 Cemented Carbide Taps ⑤ TYPE:2 TYPE:3 Roll Taps ⑥ Special Thread Taps Simple Inspection Tools ⑦ TYPE:4 TYPE:5 Pipe Taps ⑧ TYPE:6 TYPE:7 Thread Mills Premium Thread Mills ⑨ Dies ⑩ Center Drills Centering Tools ⑪ DIN ①-107 ※ This product is different from JIS products in shape and dimensions, please be careful when using.