TMPG_US-EN

Radial Passes

NPT / NPTF / BSPT / API

UN / UNJ / BSPP BSW / NPS / NPSF

ISO

Machinability E A D 1 1 2

Pitch Size Machinability E A D 28 1 1 2 27 1 1 2 19 1 1 2 18 1 1 2 14 1 2 3 11.5 1 2 3 11 1 2 3 10 1 2 3 8 2 3 4

Machinability E A D

Pitch Size

Pitch Size

0.40 1 1 2 0.45 1 1 2 0.50 1 1 2 0.70 1 1 2 0.75 1 1 2 0.80 1 1 2 1.00 1 1 2 1.25 1 2 3 1.50 1 2 3 1.75 1 2 3 2.00 1 2 3 2.50 2 3 4 3.00 2 3 4 3.50 2 3 4 4.00 2 3 4 4.50 2 3 4 5.00 2 3 4 6.00 2 3 4

64 56

1 1 2 48 1 1 2 44 1 1 2 40 1 1 2 36 1 1 2 32 1 1 2 28 1 1 2 27 1 1 2 24 1 1 2 20 1 2 3 19 1 2 3 18 1 2 3 16 1 2 3 14 1 2 3 13 1 2 3 12 1 2 3 11.5 2 2 4 11 2 2 4 10 2 3 4 9 2 3 4 8 2 3 4 7 2 3 4 6 2 3 4

1 Pass 2 Passes 3 Passes 4 Passes

Machinability codes: E = Easy A = Average D = Difficult

THREAD MILLING REFERENCE GUIDE | 55

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