Spiral Flute Tap 4-40 UNC H2 Machine Threading Tap Bit With Nitrided Coated Screw Tapping Repair Tool For Fast, Clean, Precise Threads High Speed Steel HSS6542, Right Hand Cut, 0.67 Inch Thread Length, 1.85 Inch Overall

Precision 4-40 UNC Spiral Flute Tap for Clean Threads
✔️ 4-40 UNC, right-hand cut, 0.67in thread length, 1.85in overall

Spiral flute taps are designed for machine tapping to form precise 4-40 UNC threads in blind or through holes, across metals and plastics. They’re commonly used with CNC machines, milling machines, and tapping heads, with tapping oil for best results.

✅ Thread size 4-40 UNC, right-hand cut
✅ Material: M2 high-speed steel (HSS6542) with nitrided coating
✅ Overall length 1.85in (47mm); thread length 0.67in (17mm); square end 0.1in (2.5mm)
✅ Pack: 1 piece
✅ Suitable for stainless steel, aluminum, cast iron, alloy steels, non-ferrous metals, hard plastics
✅ Use with tapping oil; machine taps with overload protection; avoid manual tapping
✅ Finish enhances hardness and corrosion resistance

💡 What is a spiral flute tap used for in precision tapping projects?
- Handy for forming clean threads in blind or deep holes
- Works with CNC machines, milling machines, and tapping heads
- Improves chip evacuation and reduces torque during starting