MARS-TECH ER8 NUT ER8 M/A pack of 1 Style:M TYPE and the 5-point contact ensures

and the 5-point contact ensures the collet nut is not distorted during tightening

These Torx screws are hardened to 50-55 HRC for wear resistance

ASRF12-50-22-4T

you can use JDMT070204 For HITACHI Brand Insert into this If any other brand have same insert can also fix to this cutter body

MARS-TECH ER8 NUT ER8 M/A pack of 1 Style:M TYPE and the 5-point contact ensuresHolds all ER8 colletsMade from alloy steel hardened to 54 56rcPrecision ground ID thread and taperER8M Collet Nut has an ID thread of 10mm X . 75 pitchOutside diameter is 12mmOutside has castle notches for tighteningUse ER8M Wrench for tighteningInternal cam removes the collet when unscrewedBlack oxide finish ER8A Collet Nut has an ID thread of 10mm X . 75 pitchOutside diameter is 13. 5mm Use a standard wrench for tightening the nut.