Page 185 - Threading_Handbook

MT LNHT and MT LNHU – Designation Code Key:

MT LNHU 21 04 I 1.5 ISO IC908

1 2 3 4 5 6 7
MT – MILLTHREAD family THREAD MILLING

1 Number of cutting edges

LNHT — Single-sided

LNHU — Double-sided

2 Insert length (INSL)

INSL

3 Insert thickness (S1)

S1
4 Thread gender

I — Internal thread
E — External thread

5 Pitch Value by number:
1.0 – 6.0 mm

4 - 32 TPI

6 Thread standard

ISO — ISO Metric
UN — American UN

W — Whitworth
BSPT — British BSPT

NPT — National pipe thread
NPTF — National pipe taper fuel

7 Grade
IC908

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