For Cutting Tap Unified Coarse Thread (UNC)

SP

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 SL

3B3B 197 2BX
1 3/8-6 UNC
2B2B 263
GH4GH61B 392 GH8
PO GH9
P3P6
P4
3B3B 199 2BX
1 1/2-6 UNCST
2B2B 265
GH4GH61B 400 GH8

GH9 ROLL

3B 2BX CARBIDE

2B Internal threads 3B Internal threads 2B Internal threads 1B LONG

HAND

TAPS

EG (STI)

SPECIAL

THREADS,

GAUGES

THREAD

MILLS

DIES

CENTER

DRILLS