Machining > Threading > Taps > Metric - Spiral Flute Taps | Suttons Spiral Flute Taps - R40 N | Dimensions | d1: M18 | d2 (mm): 14 | l1 (mm): 125 | l2 (mm): 25 | l4 (mm): 14 | Square Size (mm): 11 | z: 4 | Drill Size (mm): 15.5 (drill) | Pitch (mm): 2.5 (pitch) | Features | General purpose use | Suitable for materials up to 1000N/mm2 | Blind holes | Depths up to 2.5 x d1 | Specifications | Designation: N (for normal general purpose type materials) | Material: Premium Grade High Speed Steel (HSSE-V3) | Finish: Steam Oxide (Blue) | Max Cut Depth: 2.5xD | Shank Form: Reduced Shank (with square drive) | Helix Angle: R40 | 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 | Steel - Non-alloy, cast & free cutting (~ 0.15 %C): Annealed | Steel - Non-alloy, cast & free cutting (~ 0.45 %C): Annealed | Steel - Non-alloy, cast & free cutting (~ 0.45 %C): Quenched & Tempered | Steel - Non-alloy, cast & free cutting (~ 0.75 %C): Annealed | Steel - Low alloy & cast | Steel - Low alloy & cast | Steel - High alloy, cast & tool: Annealed