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Small silver metal tap with straight flutes and pointed tip

Greenfield Threading

Greenfield Threading 328686 Straight Flute Hand Tap Bottoming M2x0.4 3 Flutes

SKU CH-GT74-WTY2P

M2x0.4 metric bottoming hand tap, high-speed steel with TiN coating, 44.45 mm overall length and 11.11 mm thread length

  • M2x0.4 metric thread for precise small-hole tapping
  • Bottoming chamfer cuts full threads to hole bottom
  • High-speed steel with TiN coating resists wear
  • Three straight flutes clear chips efficiently
  • 45 mm overall length fits standard tap handles

M2x0.4 bottoming tap for blind holes

This straight-flute hand tap cuts metric M2 threads with a 0.4 mm pitch in a bottoming configuration. The three-flute design suits general-purpose threading in through or blind holes where chip clearance is manageable. It is intended for mechanics and hobbyists who need to create internal threads in small fasteners or precision components. Buyers needing a taper or plug chamfer for easier starting in through holes should choose a different chamfer style.

High-speed steel with TiN coating for wear

The tap is made from high-speed steel and coated with titanium nitride to extend tool life in steel and non-ferrous materials. Its 44.45 mm overall length and 11.11 mm thread length define the reach available for deep holes. The D3 thread limit produces a class 2B fit, which is standard for general assembly. Users requiring tighter or looser tolerance classes, or a different substrate for exotic alloys, will need another tap.

Drill size 1.60 mm for 75 percent thread engagement

A 1.60 mm drill produces the recommended 75 percent thread height before tapping. Using a larger or smaller drill changes the thread percentage and can affect strength or tapping torque. The right-hand cut direction matches standard metric fasteners. Anyone needing a left-hand thread or a different thread percentage must select a different tool.

How it compares

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

Price $19.99
Cheaper than about 64% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE

Questions about this item

Which thread size and pitch should I select for an M2 hole?

The tap is cut for M2 × 0.4 metric threads, so it matches a 2 mm major diameter with a 0.4 mm pitch.

What does the 11.11 mm thread length mean when I am tapping a blind hole?

Only the first 11.11 mm of the tap carry full-form threads; the bottoming lead lets you cut threads close to the bottom of a blind hole, but the usable thread depth cannot exceed that length.

What shank standard does this tap follow and what drill size does it require?

It follows a standard straight-flute hand-tap design with a D3 thread limit and needs a 1.60 mm drill for a 75 percent thread engagement in a 2B class fit.

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