Tappi Prong conditions duct symbolLS-INT-PTLS-INT-S- PTFC-PTFC-S-PTCT-PTCT-S-PTNPTS-NPTSP-NPT
Ta Surfap material ce treatmentHSS OXHSS OXHSS NIHSS NIHFHFHSSHSSHSS
NameFor taper pipe For stainl interrthreads, long ess steel, uptedFor taper pipe threads; For cast ironFor Ameri Fcan taper pip or general use threads; e
Bored For M For UiHole Shape etric Threads nified Threads
For Whitworth Threads
For Screw Threads Pipused on Sewing Machines e Threads⑧-28⑧-29⑧-36⑧-37⑧-38⑧-39
American Pipe Threads⑧-80⑧-84⑧-86
For Miniature Threads
For Trapezoidal Threads
~S25CLow carbon steels◆ ○◆ ○◆ ◎
S25C~S45CMedium carbon steels◆ ◎◆ ◎◆ ◎
S45C~High carbon steels◆ ○◆ ○◆ ○
SCMAlloy steels◆ ○◆ ○
25~35HRCHeat treated steel
35~45HRCHeat treated steel
45~55HRCHeat treated steel
55~63HRCHeat treated steel
SUSStainless steels(SUS)◆ ◎◆ ◎
SKDTool steels
SCCast steels◆ ○◆ ○
FCCast irons◆ ◎◆ ◎◆ ◎◆ ◎
FCDDuctile cast irons◆ ○◆ ○◆ ○◆ ○
CuCopper
BsBrass
BsCBrass castings◆ ◎◆ ◎
PBBronze
ALWrought aluminum
AC, ADCWrought aluminum
MgMagnesium alloy die castings
ZDCZinc alloy die castings
Titanium alloys
Nickel base alloys
Thermosetting plastic
Thermoplastic resin