Grade WU12PVWU13PVWU16PV High-Performance Thread Mills Grades and Grade Descriptions Coatings are designed for P Steel optimised tapping performance M Stainless Steel in specific materials. K Cast Iron N Non-Ferrous S High-Temp Alloys H Hardened Materials wear toughness resistance Coating Grade Description 05 10 15 20 25 30 35 40 45 P M Coated carbide. PVD fine-grain carbide substrate with high-hardness TiCN coating. K Universal grade for thread milling most materials. N S P M Coated carbide. PVD carbide substrate with heat-resistant TiAlN coating. K Universal grade for thread milling most materials. N S P M Coated carbide. PVD two-layer coating with heat-resistant TiAlN base layer and low- K friction MoS2 top layer over carbide substrate. Use for thread milling most materials,including high-hardness materials.N S H Y68 widia.com