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Greenfield Threading M8x1.25 straight flute hand tap, high-speed steel, black oxide finish

Greenfield Threading

Greenfield Threading 313571 M8x1.25 Straight Flute Hand Tap

SKU CH-06PJ-5R9KA

M8x1.25 straight-flute hand tap cuts internal threads in through-holes with a 69.06 mm overall length and 28.57 mm thread length

  • M8x1.25 metric thread fits standard holes
  • 06 mm overall length reaches deep threads
  • 57 mm thread length cuts full engagement
  • High-speed steel with black oxide resists wear
  • Three flutes clear chips for smooth tapping

M8×1.25 Metric Hand Tap for Internal Threads

The Greenfield Threading 313571 is a straight-flute hand tap designed to cut M8×1.25 metric threads in through-holes or blind holes. It suits mechanics, machinists and hobbyists who need to create or repair internal threads using a tap wrench.

Plug Chamfer Limits Starting Ease and Depth

The plug chamfer provides a moderate lead that balances starting ease with thread depth, but it cannot reach the bottom of a blind hole as a bottoming tap would. Users must ensure the drilled hole is at least 28.57 mm deep to accommodate the full thread length.

D11 Class 6H Thread Limit Determines Fit

The tap is manufactured to a D11 thread limit for a 6H class of fit, which controls the pitch-diameter tolerance of the finished thread. Selecting this tap is correct only when the application requires that specific limit; a different limit will produce a looser or tighter fit.

Highlights

  • M8x1.25 metric thread fits standard holes
  • 06 mm overall length reaches deep threads
  • 57 mm thread length cuts full engagement
  • High-speed steel with black oxide resists wear
  • Three flutes clear chips for smooth tapping

Specifications

BrandGREENFIELD THREADING

Questions about this item

Should I pick the M8x1.25 tap or a different metric size?

The 313571 is made for M8x1.25 threads only; choose this size when the drawing or fastener calls for an 8 mm major diameter with a 1.25 mm pitch.

How deep will the 28.57 mm thread length cut in one pass?

The 28.57 mm thread length is the cutting portion; in a through-hole it can tap the full thickness up to that depth, while a blind hole needs clearance beyond the cut threads.

What does the D11 thread limit mean for the finished hole?

D11 is a metric tolerance class that produces a 6H fit; the tap cuts threads that accept a standard M8x1.25 bolt with the correct allowance for coating or plating.

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