Thread diameter is 0.3 mm larger than standard

【英】困ったときの知恵袋詳細

Cutting Taps Standard (Screw Threads, Center Holes)

I was instructed by my parent company to use the SP M16X2 tap of "Ichirin-buto".
What kind of tap is this?

The "ichirin-buto" is a customary term, which meaning is approximately 0.3 mm oversized.
So it means to use a SP M16X2 tap with 0.3mm oversized.

【全:英】FIXメニュー