② Selection chart of taps Machining, in low- Tapping conditions speed tapping area Machining, in middle speed tapping area Product symbol XSL SU+SL SUXSL AU+SL AUXSL MHSL Spiral Fluted Taps (for blind hole) LKSL LKSL XL MHSL ① Tap material HSS OX HSS OX HSS HSS OX HSS OX HSS Coating HSS Coating HSS-Co Coating HSS-Co Coating Surface treatment For middle For middle For general Name Long neck use For stainless steel coated coated hardness hardness carbon steel carbon steel JIS Spiral Fluted Taps (for through hole) ② Spiral Pointed Taps (for through hole) ③ Hand Taps ④ Bored Hole Shape For Metric Threads ②-9 ②-10 ②-36 ②-16 ②-42 ②-12 ②-38 ②-4 ②-6 Cemented Carbide Taps For Unified Threads ⑤ For Whitworth Threads For Screw Threads used on Sewing Machines Pipe Threads 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 ②-1