Machining > Threading > Taps > Metric - Spiral Flute Taps | Suttons Spiral Flute Taps - R40 NH | Dimensions | d1: M8 | d2 (mm): 8 | l1 (mm): 90 | l2 (mm): 12.5 | l3 (mm): 35 | l4 (mm): 9 | Square Size (mm): 6.2 | z: 3 | Drill Size (mm): 6.8 (drill) | Pitch (mm): 1.25 (pitch) | Features | Suitable for harder short chipping materials up to 42 HRc | Blind holes | Depths up to 2.5 x d1 | Specifications | Designation: NH | Material: Powdered Metallurgy - Vanadium Grade High Speed Steel (PM-HSSE V3) | Finish: Steam Oxide (Blue) | Max Cut Depth: 2.5xD | Shank Form: Reinforced Shank (with square drive) | Helix Angle: R40 | 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 | 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