Grade WU41EGWP49EGWU40EGWN48EG High-Performance Taps Grades and Grade Descriptions P Steel Coatings are designed for M Stainless Steel optimised tapping performance in specific materials. K Cast Iron N Non-Ferrous S High-Temp Alloys H Hardened Materials wearresistance toughness Coating Grade Description 05 10 15 20 25 30 35 40 45 P M Coated HSS-E substrate with TiN PVD layer. Use in multiple applications, including K steel, stainless steel, ductile cast iron, and cast aluminium. N P M HSS-E substrate with black oxide surface treatment. Use in a variety of materials, K including steel, stainless steel, and ductile iron. Not recommended for non-ferrous materials. P M Uncoated HSS-E grade with bright surface. Use in easy-to-machine, K general-purpose applications. N Coated HSS-E, PVD lower vanadium HSS-E substrate with DLC coating. Use for tapping non-ferrous materials with low cutting temperatures like wrought aluminium. Not recommended for steel. N widia.com X9