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MTH – Designation Code Key:
THREAD MILLING 1 Tool cutting diameter (DC) 1.5 ISO IC908
45
I
MTH
2
1
5
4
3
MTH – MILLTHREAD, helical indexable inserts
DC
DC
2 Thread gender
I — Internal thread
E — External thread
3 Pitch Value by number:
1.0 – 6.0 mm
4 - 32 TPI
4 Thread standard
ISO — ISO Metric
UN — American UN
W — Whitworth
BSPT — British BSPT
NPT — National pipe thread
NPTF — National pipe taper fuel
5 Grade
IC908
186 ISCAR
