NPT External

SP4066 coated carbide threading inserts, PVD coating with higher heat resistance, stronger coating adhesion, new honed edges, can be used dry on steels and cast iron. Insert sizing code eg 16IR 16=size of insert / I=Internal E=External / L=Left hand R=Right hand. Ground inserts for high quality thread production. Suitable for all material including heat resistant alloys, austenitic stainless steel, hard steels and carbon steels