SP

SL

PO

ST

For Cutting Tap Unified Fine Thread (UNF)

Basic Pitch (+) μm Dia.

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420

P3 P5 P4

1 3/8-12 UNF3B2BX3B 154
2B2B 208
GH3GH5GH71B 312

P3 P5 P4

1 1/2-12 UNF3B2BX3B 159
2B2B 210
GH3GH5GH71B 317

ROLL

CARBIDE

LONG

3B 2BX 2B Internal threads 3B Internal threads 2B Internal threads 1B

HAND,

TAPS

EG (STI)

SPECIAL

THREADS,

GAUGES

THREAD

MILLS

DIES

CENTER

DRILLS