Machining > Threading > Taps > Metric - Spiral Flute Taps | Suttons Spiral Flute Taps - R45 Al | Dimensions | d1: M18 | d2 (mm): 14 | l1 (mm): 125 | l2 (mm): 25 | l4 (mm): 14 | Square Size (mm): 11 | z: 2 | Drill Size (mm): 15.5 (drill) | Pitch (mm): 2.5 (pitch) | Features | Suitable for use in wrought aluminium and low silicon aluminium | Blind holes | Depths up to 3 x d1 | CrN for longer tool life | Specifications | Designation: Al (for malleable alumimum with long chips) | Material: Premium Grade High Speed Steel (HSSE-V3) | Finish: Chromium Nitride (CrN) | Max Cut Depth: 3xD | Shank Form: Reduced Shank (with square drive) | Helix Angle: R45 | X: als | Type: Spiral Flute | Standard: DIN376 | Thread Form: ISO Metric Coarse (M) | Nut Tolerance: ISO 2 / 6H | Lead: Form C / 3 x P | Applications | Aluminum & Magnesium, wrought alloy - Non Heat Treatable | Aluminum & Magnesium, wrought alloy - Heat Treatable | Aluminum & Magnesium, cast alloy 12% Si - Non Heat Treatable | Aluminum & Magnesium, cast alloy 12% Si - Heat Treatable: Age Hardened | Copper & Copper alloys (Brass/Bronze) - Free cutting, Pb > 1% | Copper & Copper alloys (Brass/Bronze) - Bronze (CuSn)