P MTH-NPTF (int. & ext.) W External & Internal NPTF Helical l Thread Milling Inserts for Steam, Gas and Water Pipes S Dimensions Designation TPI l W S Int Thrd Ext Thrd IC908 MTH 23 11.5 NPTF 11.5 27.00 8.00 3.50 1"-2" NPTF 1"-2" NPTF • MTH 32 11.5 NPTF 11.5 32.00 9.00 4.00 1_1/4"-2" NPTF 1"-2" NPTF • • For cutting speed recommendations, see pages 372-373 For tools, see pages: MTSRH (endmills) (360) • MTSRH (helical shell mill) (361) THREAD MILLING TOOLS r MTH-F W Helical Long Edge Finishing Inserts l S Dimensions Designation l W S r IC908 MTH 23F R0.2 27.00 8.00 3.50 0.20 • MTH 23F R0.5 27.00 8.00 3.50 0.50 • MTH 23F R1.0 27.00 8.00 3.50 1.00 • MTH 32F R0.2 32.00 9.00 4.00 0.20 • MTH 32F R0.5 32.00 9.00 4.00 0.50 • MTH 32F R1.0 32.00 9.00 4.00 1.00 • MTH 45F R0.2 37.00 11.90 5.00 0.20 • MTH 45F R0.5 37.00 11.90 5.00 0.50 • MTH 45F R1.0 37.00 11.90 5.00 1.00 • MTH 45F R1.5 37.00 11.90 5.00 1.50 • MTH 45F R2.0 37.00 11.90 5.00 2.00 • MTH 63F R0.2 38.00 11.90 5.00 0.20 • MTH 63F R0.5 38.00 11.90 5.00 0.50 • MTH 63F R1.0 38.00 11.90 5.00 1.00 • MTH 63F R1.5 38.00 11.90 5.00 1.50 • MTH 63F R2.0 38.00 11.90 5.00 2.00 • For tools, see pages: MTSRH (endmills) (360) • MTSRH (helical shell mill) (361) 371