THREAD MILLING TOOLS TP MTH-NPT (int. & ext.) W1 External & Internal NPT Helical Thread Milling Inserts for lNSL Steam, Gas and Water Pipes S1 TP NUT Dimensions 30° 30° 90° Taper 1:16 SCREW IC908 Designation TPI(1) INSL W1 S1 THID(2) THOD(3) TP(4) MTH 23 11.5 NPT 11.5 27.00 8.00 3.50 1-2" NPT 1-2" NPT 2.209 • MTH 32 11.5 NPT 11.5 32.00 9.00 4.00 1_1/4"-2" NPT 1-2" NPT 2.209 • MTH 45 11.5 NPT 11.5 37.00 11.90 5.00 2" NPT 1-2" NPT 2.209 • MTH 45 8 NPT 8.0 37.00 11.90 5.00 2_1/2"-3" NPT - 3.175 • MTH 63 11.5 NPT 11.5 38.00 11.90 5.00 - 1-2" NPT 2.209 • MTH 63 8 NPT 8.0 38.00 11.90 5.00 2_1/2"-3" NPT - 3.175 • • For cutting speed recommendations, see page 497 (1) Threads per inch (2) Internal thread designation (3) External thread designation (4) Thread pitch For tools, see pages: MTSRH (endmills) (476) • MTSRH (helical shell mill) (477) TP MTH-NPTF (int. & ext.) W1 External & Internal NPTF Helical Thread Milling Inserts for lNSL Steam, Gas and Water Pipes S1 TP NUT Dimensions 55° RE=0.137TP SCREW IC908 Designation TPI(1) INSL W1 S1 THID(2) THOD(3) TP(4) MTH 23 11.5 NPTF 11.5 27.00 8.00 3.50 1"-2" NPTF 1"-2" NPTF 2.209 • MTH 32 11.5 NPTF 11.5 32.00 9.00 4.00 1_1/4"-2" NPTF 1"-2" NPTF 2.209 • • For cutting speed recommendations, see page 497 (1) Threads per inch (2) Internal thread designation (3) External thread designation (4) Thread pitch For tools, see pages: MTSRH (endmills) (476) • MTSRH (helical shell mill) (477) 494 ISCAR