
⑧ Selection chart of taps Tapping conditions Product symbol LS-SP-PS LS-PF LS-SP-PF PS LH PF LH SU-PF SU-SP-PF Spiral Fluted Taps (for blind hole) AUSP Rp AUSP G ① Tap material HSS HSS HSS HSS HSS HSS Coating HSS Coating HSS OX HSS OX Surface treatment For parallel pipe threads; Long, for For parallel pipe threads; For general use For parallel pipe For parallel pipe threads Name general use For left-hand threads threads, coated For stainless steel Spiral Fluted Taps (for through hole) ② Spiral Pointed Taps (for through hole) ③ Hand Taps ④ Bored Hole Shape For Metric Threads Cemented Carbide Taps For Unified Threads ⑤ For Whitworth Threads For Screw Threads used on Sewing Machines Pipe Threads ⑧-46 ⑧-73 ⑧-75 ⑧-43 ⑧-72 ⑧-10 ⑧-12 ⑧-76 ⑧-77 American Pipe Threads Roll Taps For Miniature Threads ⑥ For Trapezoidal Threads ◆ ◆ ~ S25C Low carbon steels ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◎ ◎ ◆ ◎ ◆ ◎ ◆ ◆ ◆ ◆ S25C ~ S45C Medium carbon steels ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◆ ◎ ◎ ◎ ◆ ○ ◆ ○ ◆ ◆ ◆ ◆ S45C ~ High carbon steels ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◆ ○ ◎ ◎ ◆ ○ Special Thread Taps Simple Inspection Tools ◆ ◆ ⑦ ◆ ◆ SCM Alloy steels ◎ ◎ ◆ ◎ ◆ ◆ 25 ~ 35HRC Heat treated steel 35 ~ 45HRC Heat treated steel 45 ~ 55HRC Heat treated steel Pipe Taps 55 ~ 63HRC Heat treated steel ⑧ ◆ ◆ SUS Stainless steels(SUS) ○ ○ ◆ ◎ ◆ ◎ ◆ ◆ SKD Tool steels SC Cast steels FC Cast irons Thread Mills Premium Thread Mills ⑨ FCD Ductile cast irons Cu Copper Bs Brass BsC Brass castings Dies PB Bronze ⑩ AL Wrought aluminum AC, ADC Wrought aluminum ◆ ○ ◆ ○ Mg Magnesium alloy die castings ZDC Zinc alloy die castings ◆ ○ ◆ ○ Center Drills Centering Tools Titanium alloys ⑪ Nickel base alloys Thermosetting plastic Thermoplastic resin ⑧-5