Machining > Threading > Taps > Metric - Spiral Flute Taps | Suttons Spiral Flute Taps - R40 NH | Dimensions | d1: M20 | d2 (mm): 16 | l1 (mm): 140 | l2 (mm): 25 | l4 (mm): 15 | Square Size (mm): 12 | z: 4 | Drill Size (mm): 17.5 (drill) | Pitch (mm): 2.5 (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: Titanium Aluminium Nitride (TiAIN) | 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 (~ 0.45 %C): Quenched & Tempered | Steel - Non-alloy, cast & free cutting (~ 0.75 %C): Annealed | Steel - Non-alloy, cast & free cutting (~ 0.75 %C): Quenched & Tempered | Steel - Low alloy & cast | Steel - Low alloy & cast | Steel - High alloy, cast & tool: Annealed | Stainless Steel - Precipitation Hardening | Aluminum & Magnesium, cast alloy >12% Si - Non Heat Treatable