Machining, LS-NPTin low-speed LS-SP-S- NPTtapping are INT-NPTa INT-S-NPTNPTFLS-NPTFRpMac PShining, in lo SP-PSw/middle sp Geed tapping PFarea SP-PFLS-PS
HSSHSSHSS OXHSS OXHSSHSSHSSHSSHSSHSSHSSHSSHSS
For Amer pipe t Long,forgican taper hreads eneral useFor America thre For stainless stn taper pipe ads eel, interruptedFor American Dryseal taper pipe threads; For general useFor American Dryseal taper pipe threads Long, for general useFor parallel pipe threads; For general useFor parallel pipe threads; Long, forgeneral use
⑧-85⑧-88⑧-89⑧-91⑧-92⑧-96⑧-40⑧-41⑧-45⑧-49⑧-70⑧-74⑧-44
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Tap material Name For American taper pipe threads; For general use

Bored Hole Shape For Metric Threads For Unified Threads For Whitworth Threads For Screw Threads used on Sewing Machines

For Miniature Threads For Trapezoidal Threads

25~35HRCHeat treated steel
35~45HRCHeat treated steel
45~55HRCHeat treated steel
55~63HRCHeat treated steel

SKD Tool steels

FCCast irons
FCDDuctile cast irons
CuCopper
BsBrass
BsCBrass castings

PB Bronze AL Wrought aluminum AC, ADC Wrought aluminum Mg Magnesium alloy die castings

ZDC Zinc alloy die castings Titanium alloys Nickel base alloys