Page 521 - 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 5.2 5.23 Y87412 3P 2.5 0.433 1 - 0.255 0.191 0.312 3 002 f
GH3 5.2 5.23 Y87428 3P 2.5 0.433 1 - 0.255 0.191 0.312 3 002 f SP
GH3 5.2 5.23 Y87028 1.5P 2.5 0.433 1 - 0.255 0.191 0.312 3 002 f
STI No.10-24UNC
GH2 5.2 5.23 Y87012 1.5P 2.5 0.433 1 - 0.255 0.191 0.312 3 002 f
GH5 5.2 5.23 Y87445 1.5P 2.5 0.433 1 - 0.255 0.191 0.312 3 002 f
SL
GH2 6.8 6.81 Y87448 3P 2.718 0.472 1.125 - 0.318 0.238 0.375 3 002 f
GH3 6.8 6.81 Y87458 3P 2.718 0.472 1.125 - 0.318 0.238 0.375 3 002 f
STI 1/4-20UNC
GH3 6.8 6.81 Y87058 1.5P 2.718 0.472 1.125 - 0.318 0.238 0.375 3 002 f
GH5 6.8 6.81 Y87090 1.5P 2.718 0.472 1.125 - 0.318 0.238 0.375 3 002 f
PO
GH3 8.4 8.43 Y87460 3P 2.937 0.551 1.25 - 0.381 0.286 0.437 3 002 f
GH4 8.4 8.43 Y87470 3P 2.937 0.551 1.25 - 0.381 0.286 0.437 3 002 f
STI 5/16-18UNC
GH2 8.4 8.43 Y87060 1.5P 2.937 0.551 1.25 - 0.381 0.286 0.437 3 002 f
GH3 10 10.06 Y87462 3P 3.375 0.630 - - 0.367 0.275 0.437 3 014 f ST
GH4 10 10.06 Y87472 3P 3.375 0.630 - - 0.367 0.275 0.437 3 014 f
STI 3/8-16UNC
GH3 10 10.06 Y87062 1.5P 3.375 0.630 - - 0.367 0.275 0.437 3 014 f
GH3 11.7 11.71 Y87464 3P 3.593 0.709 - - 0.429 0.322 0.5 3 014 f
STI 7/16-14UNC
ROLL
GH3 13.2 13.33 Y87466 3P 3.812 0.748 - - 0.48 0.36 0.562 3 014 f
GH3 13.2 13.33 Y87066 1.5P 3.812 0.748 - - 0.48 0.36 0.562 3 014 f
STI 1/2-13UNC
GH5 13.2 13.33 Y87088 1.5P 3.812 0.748 - - 0.48 0.36 0.562 3 014 f
CARBIDE
TCTR Ø Hole Ø THCHT LF THL LU LS DCON K LK
(tolerance) (mm) (mm) (chamfer) (inch) (inch) (inch) (inch) (inch) (inch) (inch)
EG(STI) UNF Code NOF Type Stock
ANSI
GH2 3.7 3.77 Y87409 3P 2.125 0.276 0.75 - 0.168 0.131 0.25 3 002 f
STI No.6-40UNF
GH2 5.1 5.14 Y87413 3P 2.5 0.354 1 - 0.255 0.191 0.312 3 002 f LONG
GH3 5.1 5.14 Y87429 3P 2.5 0.354 1 - 0.255 0.191 0.312 3 002 f
STI No.10-32UNF
GH3 5.1 5.14 Y87029 1.5P 2.5 0.354 1 - 0.255 0.191 0.312 3 002 f
GH5 5.1 5.14 Y87057 1.5P 2.5 0.354 1 - 0.255 0.191 0.312 3 002 f HAND
GH2 6.6 6.68 Y87449 3P 2.718 0.394 1.125 - 0.318 0.238 0.375 3 002 f TAPS
GH3 6.6 6.68 Y87459 3P 2.718 0.394 1.125 - 0.318 0.238 0.375 3 002 f
STI 1/4-28UNF
GH2 6.6 6.68 Y87059 1.5P 2.718 0.394 1.125 - 0.318 0.238 0.375 3 002 f
GH5 6.6 6.68 Y87091 1.5P 2.718 0.394 1.125 - 0.318 0.238 0.375 3 002 f EG (STI)
GH2 8.3 8.31 Y87451 3P 2.937 0.394 1.25 - 0.381 0.286 0.437 3 002 f
ANSI
GH3 8.3 8.31 Y87461 3P 2.937 0.394 1.25 - 0.381 0.286 0.437 3 002 f
STI 5/16-24UNF
GH3 8.3 8.31 Y87061 1.5P 2.937 0.394 1.25 - 0.381 0.286 0.437 3 002 f SPECIAL
GH2 9.8 9.89 Y87453 3P 3.156 0.472 - - 0.323 0.242 0.406 3 014 f THREADS,
GAUGES
GH2 9.8 9.89 Y87063 1.5P 3.156 0.472 - - 0.323 0.242 0.406 3 014 f
STI 3/8-24UNF
GH3 9.8 9.89 Y87463 3P 3.156 0.472 - - 0.323 0.242 0.406 3 014 f
GH5 9.8 9.89 Y87085 1.5P 3.156 0.472 - - 0.323 0.242 0.406 3 014 f THREAD
GH3 11.5 11.53 Y87465 3P 3.375 0.472 - - 0.367 0.275 0.437 3 014 f MILLS
GH4 11.5 11.53 Y87475 3P 3.375 0.472 - - 0.367 0.275 0.437 3 014 f
STI 7/16-20UNF
GH3 11.5 11.53 Y87065 1.5P 3.375 0.472 - - 0.367 0.275 0.437 3 014 f
GH3 13.1 13.12 Y87467 3P 3.593 0.512 - - 0.429 0.322 0.5 3 014 f DIES
STI 1/2-20UNF
GH3 13.1 13.12 Y87067 1.5P 3.593 0.512 - - 0.429 0.322 0.5 3 014 f

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. 519
Check page 673 of Technical info for full details.