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Widia spiral flute tap M16x1.50 bottoming two flutes high speed steel

Widia Gtd

Widia Gtd VTSFT-TC5566 Spiral Flute Tap M16x1.50 Bottoming 2 Flutes Metric Fine

SKU CH-9S2K-F4N30

Cuts M16x1.50 metric fine threads in a bottoming hole using two spiral flutes and high-speed steel

  • M16 x 1.5 fine thread for precise automotive fits
  • Spiral flute design clears chips in deep blind holes
  • Two-flute high-speed steel taps tough alloy steels
  • 7 mm thread length reaches full depth in 96.8 mm overall
  • D6 limit and 6H class ensure gauge-perfect threads

Widia Gtd VTSFT-TC5566 Spiral Flute Tap

The Widia Gtd VTSFT-TC5566 is a high-speed steel spiral flute tap designed to cut metric fine threads. It produces M16x1.50 internal threads with a Class 6H fit for general engineering applications.

Machinists cutting blind holes in steel or cast iron

This bottoming tap suits workshops needing to thread close to the bottom of blind holes. It is not for through-hole tapping where a plug chamfer clears chips forward, nor for hand tapping where a taper start eases alignment.

Two-flute geometry aids chip evacuation in blind

The 27.70 mm thread length and 96.80 mm overall length reach standard depths. Use the specified 14.50 mm drill size for 75 percent thread engagement; an oversized hole reduces strength while an undersized hole increases torque and breakage risk.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $95.99
Pricier than about 82% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameWIDIA

Questions about this item

What thread size and drill bit do I need to prepare before using the M16×1.50 tap?

The tap cuts an M16×1.50 metric fine thread and requires a 14.50 mm drill for 75 % thread engagement.

Will the 96.80 mm overall length and 27.70 mm thread length reach through my existing fixture?

The tap is 96.80 mm long overall with a 27.70 mm cutting portion; measure your fixture depth to confirm reach.

How can I verify the tap is producing the correct 6H class fit after threading?

Check the finished hole with an M16×1.50 6H go / no-go gauge; the go gauge should enter fully and the no-go should not.

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