HSS Spiral Flute Power Tool Tap, Metric, ISO Standard Material ID: 8180408 Spiral Flute Power Tool Tap with chamfer form C with a 2-3xP semi-bottoming lead, for ISO-Metric thread M4 with 0.70 mm pitch and 6H class of fit, dimensions according to ISO 529 standard with 4.0mm shank and 3.15mm square drive, HSS with bright finish and 35 helix angle for 2xD blind hole threading in general purpose applications Bright finish Prevents work piece material from sticking to the cutting edge Simple, strong design in high-quality HSS Cost Effective solution for general usage Spiral flute Designed for efficient threading of blind holes Shorter ISO Standard design Stable and reliable performance, up to 2 x d hole depth Description Thread diameter size (TDZ) 4 Premachined hole diameter - millimeter (PHD) 3.3 mm Thread pitch - millimeter (TP) 0.7 mm Overall length - millimeter (OAL) 53 mm Threading length - millimeter (THL) 8 mm Usable Length - millimeter (LU) 21 mm Connection diameter - milli