® Spiral Mill - Thread Inserts Product Identification - Ordering Codes Spiral Mill - Thread Inserts H 19 I 3.0 ISO MT7 Helical Cutting Diameter Thread Pitch Thread Profile: (Spiral) 19 = 19 mm ISO UN I = InternalE = External- = Ext. + Int. WHITBSPT Carbide GradeNPT NPTF NPS Spiral Mill - Thread Toolholders S R H 32 P - 5 Clamping Method Helical Length of No. of S = Screw (Spiral) Toolholders Inserts Cutting Diameter Holder Type 32 = 32 mm M = Shell Mill B04-2