M4 HSS Nitriding Treatment Machine Spiral Flute Screw Thread Forming Tap 4mm0.7mm55mm M8

Spiral wire tapping is a spiral type. Spiral wire tapping in tapping and to the spiral groove of the

upward rotating effect, able to easily put iron discharge hole, in order to avoid iron residue or the

blockage in the groove, resulting in a screw tap breaking edge crack.



Specifications:

Material:HSS

:Carbon black

Type size:

M4: 4mm*0.7mm

Length:55mm



Features:

-Growth in the service life and out the highest accuracy of the thread.

-Spiral screw is suitable for materials with high toughness, and is not

suitable for cast iron scraps into fine materials



Package include:

1xscrew tap 4mm*0.7mm*55mm



















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