Page 525 - Yamawa_European_Catalogue_YEU23

h stock standard, ) check stock EU, f check stock JP, m stock exhaustion

TCTR Ø Hole Ø Code THCHT LF THL LU LS DCON K LK NOF Type Stock Intro
EG(STI) UNC (tolerance) (mm) (mm) (chamfer) (inch) (inch) (inch) (inch) (inch) (inch) (inch)
ANSI
GH2 2.35 2.4 Y87200 4.5P 1.875 0.335 0.562 - 0.141 0.11 0.187 2 030 f
STI No.2-56UNC
GH1 3.1 3.13 Y87203 4.5P 2 0.413 0.687 - 0.141 0.11 0.187 3 030 f SP
STI No.4-40UNC
GH2 3.1 3.13 Y87204 4.5P 2 0.413 0.687 - 0.141 0.11 0.187 3 030 f
GH2 3.8 3.83 Y87208 4.5P 2.375 0.531 0.875 - 0.194 0.152 0.25 3 030 f
GH3 3.8 3.83 Y87224 4.5P 2.375 0.531 0.875 - 0.194 0.152 0.25 3 030 f
STI No.6-32UNC
SL
GH2 4.4 4.48 Y87210 4.5P 2.375 0.571 0.937 - 0.22 0.165 0.281 3 030 f
STI No.8-32UNC
GH3 4.4 4.48 Y87226 4.5P 2.375 0.571 0.937 - 0.22 0.165 0.281 3 030 f
GH2 5.2 5.23 Y87212 4.5P 2.5 0.591 1 - 0.255 0.191 0.312 3 030 f
STI No.10-24UNC
GH3 5.2 5.23 Y87228 4.5P 2.5 0.591 1 - 0.255 0.191 0.312 3 030 f
PO
GH2 6.8 6.81 Y87248 4.5P 2.718 0.669 1.125 - 0.318 0.238 0.375 3 030 f
STI 1/4-20UNC
GH3 6.8 6.81 Y87258 4.5P 2.718 0.669 1.125 - 0.318 0.238 0.375 3 030 f
GH3 8.4 8.43 Y87260 4.5P 2.937 0.748 1.25 - 0.381 0.286 0.437 3 030 f
STI 5/16-18UNC
GH4 8.4 8.43 Y87272 4.5P 2.937 0.748 1.25 - 0.381 0.286 0.437 3 030 f ST
GH3 10 10.06 Y87262 4.5P 3.375 0.984 - - 0.367 0.275 0.437 3 007 f
GH4 10 10.06 Y87270 4.5P 3.375 0.984 - - 0.367 0.275 0.437 3 007 f
STI 3/8-16UNC
GH3 11.7 11.71 Y87264 4.5P 3.593 0.984 - - 0.429 0.322 0.5 3 007 f
ROLL
STI 7/16-14UNC
GH3 13.2 13.33 Y87266 4.5P 3.812 1.083 - - 0.48 0.36 0.562 3 007 f
STI 1/2-13UNC
TCTR Ø Hole Ø Code THCHT LF THL LU LS DCON K LK NOF Type Stock
EG(STI) UNF (tolerance) (mm) (mm) (chamfer) (inch) (inch) (inch) (inch) (inch) (inch) (inch)
ANSI
CARBIDE
GH2 3.7 3.77 Y87209 4.5P 2.125 0.453 0.75 - 0.168 0.131 0.25 3 030 f
STI No.6-40UNF
GH2 5.1 5.14 Y87213 4.5P 2.5 0.591 1 - 0.255 0.191 0.312 3 030 f
GH3 5.1 5.14 Y87229 4.5P 2.5 0.591 1 - 0.255 0.191 0.312 3 030 f
STI No.10-32UNF
GH2 6.6 6.68 Y87249 4.5P 2.718 0.669 1.125 - 0.318 0.238 0.375 3 030 f LONG
STI 1/4-28UNF
GH3 6.6 6.68 Y87259 4.5P 2.718 0.669 1.125 - 0.318 0.238 0.375 3 030 f
GH2 8.3 8.31 Y87251 4.5P 2.937 0.748 1.25 - 0.381 0.286 0.437 3 030 f
STI 5/16-24UNF
GH3 8.3 8.31 Y87261 4.5P 2.937 0.748 1.25 - 0.381 0.286 0.437 3 030 f HAND
GH2 9.8 9.89 Y87253 4.5P 3.156 0.866 - - 0.323 0.242 0.406 3 007 f TAPS
STI 3/8-24UNF
GH3 9.8 9.89 Y87263 4.5P 3.156 0.866 - - 0.323 0.242 0.406 3 007 f
GH3 11.5 11.53 Y87265 4.5P 3.375 0.984 - - 0.367 0.275 0.437 3 007 f
GH4 11.5 11.53 Y87275 4.5P 3.375 0.984 - - 0.367 0.275 0.437 3 007 f EG (STI)
STI 7/16-20UNF
GH3 13.1 13.12 Y87267 4.5P 3.593 0.984 - - 0.429 0.322 0.5 3 007 f
ANSI
STI 1/2-20UNF
SPECIAL
THREADS,
GAUGES

THREAD
MILLS

DIES

CENTER
DRILLS

Technical
info

The most suitable GH tap class to cut accurate 2B, 3B (UNJ) and 2B oversized internal threads tolerance, depends
on application conditions and work-piece materials. Yamawa GH class system offers a wide range of alternative
tap classes allowing each customer to select the most suitable one according to application requirement. 523
Check page 673 of Technical info for full details.