Machining > Threading > Taps > Metric - Spiral Flute Taps | Suttons Spiral Flute Taps - R45 Cu | Dimensions | d1: M3 | d2 (mm): 3.5 | l1 (mm): 56 | l2 (mm): 5 | l3 (mm): 18 | l4 (mm): 6 | Square Size (mm): 2.7 | z: 3 | Drill Size (mm): 2.5 (drill) | Pitch (mm): 0.5 (pitch) | Features | Suitable for use in soft materials | CrN for copper and non-ferrous materials | Blind Holes | Depths up to 3 x d | Specifications | Designation: Cu (for copper materials) | Material: Premium Grade High Speed Steel (HSSE-V3) | Finish: Chromium Nitride (CrN) | Max Cut Depth: 3xD | Shank Form: Reinforced Shank (with square drive) | Helix Angle: R45 | X: als | Type: Spiral Flute | Standard: DIN371 | Thread Form: ISO Metric Coarse (M) | Nut Tolerance: ISO 2 / 6H | Lead: Form C / 3 x P | Applications | Copper & Copper alloys (Brass/Bronze) - Free cutting, Pb > 1% | Copper & Copper alloys (Brass/Bronze) - Bronze (CuSn)