Taps 1)Material: Carbon steel, alloy steel, HSS, HW 2)According to the stardards of ISO, JIS, DIN, etc. Taps1)Material: Carbon steel, alloy steel, HSS, HW 2)According to the stardards of ISO, JIS, DIN, etc.Disclaimer on Recommended Tap Hole SizesRecommended Tap Hole sizes are based on the industry accepted standard of 75% usable thread, using the industry accepted formula.There are cases in which ...