16NR11.5NPT GP6

16NR11.5NPT GP6 (3IR11.5NPT GP6) Toolflo 11.5 NPT threading insert to fit all 16NR or 3IR style internal threading toolholders.  
This insert grade is a PVD Tin coated carbide similar to the Carboloy 550, Iscar IC656 or the Valenite VN8 grades.
It is good for soft to medium steels at moderate speeds.  It can also be used in Stainless Steels.  It would be in the M10-M20 -P15 to P20 range carbides.