Machining > Threading > Taps > Imperial - Spiral Point Taps | Suttons Spiral Point (Gun) Taps - N | Dimensions | d1 (mm): 3.175 | d2 (mm): 3.5 | l1 (mm): 56 | l2 (mm): 11 | l3 (mm): 18 | l4 (mm): 6 | Square Size (mm): 2.7 | z: 3 | Drill Size (mm): 2.65 (drill) | TPI: 44 (TPI) | Features | General purpose use, materials up to approx. 1000 N/mm2 | Through holes | Suitable for machine operations | Depths up to 3 x d1 | Specifications | Designation: N (for normal and general purpose type materials) | Material: Premium Grade High Speed Steel (HSSE-V3) | Finish: Titanium Nitride (TiN) | Max Cut Depth: 3xD | Shank Form: Reinforced Shank (with square drive) | X: als | Type: Spiral Point (Gun) | Standard: DIN2184-1 | Thread Form: UNF | Nut Tolerance: 2B | Lead: Form B / 4.5 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 | Aluminum & Magnesium, wrought alloy - Non Heat Treatable | Aluminum & Magnesium, wrought alloy - Heat Treatable: Age Hardened | Copper & Copper alloys (Brass/Bronze) - Free cutting, Pb > 1%