aタップは調質前（生材）と調質鋼（調質後）の共用は可能？ | オーエスジー

A Tap , whether raw materials and tempered materials can be shared

A Tap can be used for processing raw materials up to 30HRC.

Workpieces with a hardness greater than 30HRC require the selection of Tap corresponding to that hardness.

Reference: A Tap Series