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THREAD TYPES & BASIC PROFILE
Thread Types & Basic Profile/Applicable Toolholders & Inserts
A GRADES Basic Profile Symbol Thread Applicable Insert Applicable Toolholder
(Previous Symbol) Type
M External 16E§ISO KTN§-16
Threading 16E§ISO-TF KTNSR-16
16E§60
INSERTS
B Metric TTX32§60 KTTX§-16F, S-KTTX§16
e.g.) Internal I§ISO SIN§S-(E)
M30 Threading I§ISO-TF
CBN & PCD I§60()
C KCT(K/P)§ KKC§-
UN External 16E§UN-TF KTN§-16
UNC Threading
UNF 16E§60 KTNS§-16
E TURNING Unified UNEF TTX32§60 KTTX§-16F, S-KTTX§16
e.g.) Internal I§UN-TF SIN§S-(E)
3/4 -16 UNF Threading I§60()
F BORING KCT(K/P)§ S-KKC§
Parallel Pipe External Threading: External 16E§W KTN§-16
Threading 16E§W-TF KTNSR-16
G(PF) 16E§55
GROOVING Internal Threading:
G G(PF) TTX32§55 KTTX§-16F, S-KTTX§16
Rp(PS)
I§W
Internal
e.g.) Threading I§W-TF SIN§S-(E)
G3/4 (PF3/4) I§55()
H CUT-OFF External 16E§W KTN§-16
Threading KTNS§-16
W 16E§W-TF
Whitworth 16E§55
J SOLID END MILLS THREADING TTX32§55 KTTX§-16F, S-KTTX§16
e.g.) Internal I§W
Threading
W3/8 I§W-TF SIN§S-(E)
I§55()
L External Threading: External 16E§PT KTN§-16
Threading
R(PT)
(BSPT)
Tapered Pipe KTNS§-16
MILLING Internal Threading: TTX32§55* KTTX§-16F, S-KTTX§16
Rc(PT)
M (BSPT)
Internal I§PT
e.g.) Threading I§PT-TF SIN§S-(E)
R1/2 (PT1/2)
P SPARE PARTS American National Pipe External 16E§NPT KTN§-16
Threading
NPT KTNS§-16
R TECHNICAL e.g.) Internal 16I§NPT SIN§S-16
3/8 -18 NPT Threading
T INDEX External 16E§Tr KTN§-16
30° Trapezoidal Threading
Tr KTNS§-16
e.g.) Internal 16I§Tr SIN§S-16
Tr 263 Threading
• Above shows the usage example of applicable Toolholders / Inserts. …For thecase when the thread root's corner-R can be smaller than the standard.
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