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      Beyond™ Left-Hand Spiral-Flute, Right-Hand Cut HSS-E-PM Taps • Through Holes
      Beyond™ Left-Hand Spiral-Flute, Right-Hand Cut HSS-E-PM Taps • Through Holes
      Beyond™ Left-Hand Spiral-Flute, Right-Hand Cut HSS-E-PM Taps • Through Holes
      Beyond™ Left-Hand Spiral-Flute, Right-Hand Cut HSS-E-PM Taps • Through Holes

      T660 • Machine Screw and Fractional • Form D Plug Chamfer

      Beyond™ Left-Hand Spiral-Flute, Right-Hand Cut HSS-E-PM Taps • Through Holes

      Metric
      Inch
      SAP Material Number 5565550
      ISO Catalog Number T660NF02500-28RH3-A
      ANSI Catalog Number T660NF02500-28RH3-A
      Grade KSSM24
      [D1-TDZ] Thread Diameter Size 1/4 - 28
      [L] Overall Length 63.4000
      [L] Overall Length 2.500
      [L3] Thread Length 11.1000
      [L3] Thread Length .4400
      [L2] Useable Length 25.5000
      [L2] Useable Length 1.000
      [D] Adapter / Shank / Bore Diameter 6.477
      [D] Adapter / Shank / Bore Diameter .255
      [Z] Number of Flutes 3
      Tap Pitch Diameter Limit H3
      See all Product Variants

      Uses and application

      • Tapping: Through HoleTapping: Through Hole
      • HSS-E-PMHSS-E-PM
      • Tapping Helix Angle: L15°Tapping Helix Angle: L15°
      • Flood Coolant: TappingFlood Coolant: Tapping
      • Manufacturer’s Specs: UNFManufacturer’s Specs: UNF
      • Manufacturer’s Specs: UNCManufacturer’s Specs: UNC
      • Manufacturer’s Specs: ANSIManufacturer’s Specs: ANSI
      • Chamfer Form D (3.5–5)Chamfer Form D (3.5–5)

      Workpiece Materials

      S High-Temp Alloys

      Features and benefits

      • KSS20 nitride for titanium and titanium alloys.

      • KSSM24 TiN + CrC/C for titanium and titanium alloys.

      Machine Side

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      Workpiece Side

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      Grades

      • KSS20

        Surface treated HSS-E-PM: powder metal HSS-E-PM substrate with nitride surface treatment that provides wear resistance in non-ferrous materials including titanium. Use for tapping titanium and titanium alloys.

        S High-Temp Alloys
      • KSSM24

        Coated HSS-E-PM, PVD: heat- and wear-resistant high- vanadium, high-cobalt powder metal HSS-E-PM substrate. Coating consists of low friction CrC/C over wear-resistant TiN base layer. Use for tapping titanium and titanium alloys.

        S High-Temp Alloys

      Tolerances

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