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TP
THREAD MILLING TOOLS
MTH-ISO (internal) W1
Helical Thread Milling Inserts for
ISO Metric Internal Threading lNSL

S1

TP NUT
TP/4 Dimensions
60˚
TP/8
SCREW
Designation TP mm (1) INSL W1 S1 THID (2) IC908
MTH 23 I 1.0 ISO 1.000 1.063 .315 .138 ≥M26 •
MTH 32 I 1.0 ISO 1.000 1.260 .354 .157 ≥M34 •
MTH 23 I 1.5 ISO 1.500 1.063 .315 .138 ≥M27 •
MTH 32 I 1.5 ISO 1.500 1.260 .354 .157 ≥M35 •
MTH 45 I 1.5 ISO 1.500 1.457 .469 .197 ≥M50 •
MTH 63 I 1.5 ISO 1.500 1.496 .469 .197 ≥M70 •
MTH 23 I 2.0 ISO 2.000 1.063 .315 .138 ≥M28 •
MTH 32 I 2.0 ISO 2.000 1.260 .354 .157 ≥M36 •
MTH 45 I 2.0 ISO 2.000 1.457 .469 .197 ≥M50 •
MTH 63 I 2.0 ISO 2.000 1.496 .469 .197 ≥M70 •
MTH 23 I 3.0 ISO 3.000 1.063 .315 .138 ≥M30 •
MTH 32 I 3.0 ISO 3.000 1.260 .354 .157 ≥M38 •
MTH 45 I 3.0 ISO 3.000 1.457 .469 .197 ≥M56 •
MTH 63 I 3.0 ISO 3.000 1.496 .469 .197 ≥M75 •
MTH 23 I 3.5 ISO 3.500 1.063 .315 .138 ≥M33 •
MTH 32 I 3.5 ISO 3.500 1.260 .354 .157 - •
MTH 45 I 3.5 ISO 3.500 1.457 .469 .197 - •
MTH 23 I 4.0 ISO 4.000 1.063 .315 .138 ≥M36 •
MTH 32 I 4.0 ISO 4.000 1.260 .354 .157 ≥M40 •
MTH 45 I 4.0 ISO 4.000 1.457 .469 .197 ≥M56 •
MTH 63 I 4.0 ISO 4.000 1.496 .469 .197 ≥M75 •
MTH 32 I 4.5 ISO 4.500 1.260 .354 .157 ≥M42 •
MTH 45 I 4.5 ISO 4.500 1.457 .469 .197 - •
MTH 32 I 5.0 ISO 5.000 1.260 .354 .157 ≥M48 •
MTH 45 I 5.0 ISO 5.000 1.457 .469 .197 - •
MTH 45 I 5.5 ISO 5.500 1.457 .469 .197 ≥M56 •
MTH 45 I 6.0 ISO 6.000 1.457 .469 .197 ≥M64 •
MTH 63 I 6.0 ISO 6.000 1.496 .469 .197 ≥M78 •
• For cutting speed recommendations, see page 475
(1) Thread pitch
(2) Internal thread designation
For tools, see pages: MTSRH (endmills) (456) • MTSRH (helical shell mill) (457)

468 ISCAR