Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools ⑧ Selection chart of taps Tapping conditions Product symbol Rc PT PT-X S-PT SP-PT SP-S-PT SP-PT-X LS-PT LS-S-PT ① Tap material Surface treatment HSS HSS HSS HSS HSS HSS HSS HSS HSS Name For taper pipe threads; For general use For taper pipe threads;Long, for general use ② ③ ④ Bored Hole Shape For Metric Threads ⑤ For Unified ThreadsFor Whitworth Threads For Screw Threads used on Sewing Machines Pipe Threads ⑧-13 ⑧-14 ⑧-16 ⑧-17 ⑧-21 ⑧-22 ⑧-23 ⑧-19 ⑧-20 American Pipe Threads For Miniature Threads ⑥ For Trapezoidal Threads ~ S25C Low carbon steels ◆ ◎ ◆ ◎ ◆ ◎ S25C ~ S45C Medium carbon steels ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ S45C ~ High carbon steels ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ⑦ SCM Alloy steels ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ 25 ~ 35HRC Heat treated steel 35 ~ 45HRC Heat treated steel 45 ~ 55HRC Heat treated steel ⑧ 55 ~ 63HRC Heat treated steelSUSStainless steels(SUS) SKD Tool steels SC Cast steels FC Cast irons ⑨ FCD Ductile cast irons Cu Copper Bs Brass BsC Brass castings PB Bronze ⑩ AL Wrought aluminum AC, ADC Wrought aluminum Mg Magnesium alloy die castings ZDC Zinc alloy die castings ⑪ Titanium alloys Nickel base alloys Thermosetting plastic Thermoplastic resin ⑧-1