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Counterbores

141 results found that include 141 products

Pick up the porting tools and counterbores you need for precision machining operations at Grainger. Use porting tools for NC and CNC porting applications, to help contour ports in various metals, composites and hard-to-machine materials. The optimized helix design of socket head cap screw counterbores can flow chips away from the tool to help eliminate smearing and material build-up in the flutes. Shop Grainger today for high-quality porting tools and counterbores!Close

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  • Counterbore,1/32in Oversize,Size 3/8in,
    Counterbore,1/32in Oversize,Size 3/8in,
    • ALVORD-POLK
    • Item # 33RE12
    • Mfr. Model # 03023
    • Counterbore, Built-In Pilot, 1/32 In. Oversize, Number of Pieces 1, Number of Flutes 4, Screw Size 3/8 In.,...More

  • Counterbore,Close Fit,Size 3/8,Cobalt
    Counterbore,Close Fit,Size 3/8,Cobalt
    • KEO
    • Item # 2RTP4
    • Mfr. Model # 55221
    • Counterbore, Built-in Pilot, Nominal/Close Fit, Number of Flutes 3 Screw Size 3/8 In., Socket Head Cap...More

  • Counterbore,1/32 Clearance,Size 3/8,Co
    Counterbore,1/32 Clearance,Size 3/8,Co
  • Port Tool,MS33649,Reamer,7/8-14 UNJF
    Port Tool,MS33649,Reamer,7/8-14 UNJF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYK2
    • Mfr. Model # MS33649-10R
    • Port Tool, Reamer Pilot, AS5202, Number of Flutes 4, Tube Dia 0.625 In, Thread Size 0.8750-14UNJF-3B, Spot...More

  • Counterbore,1/32 Clearance,Size #4,Co
    Counterbore,1/32 Clearance,Size #4,Co
    • KEO
    • Item # 2RTL3
    • Mfr. Model # 55202
    • Counterbore, Built-in Pilot, 1/32 In Clearance, Number of Flutes 3, Screw Size #4, Socket Head Cap Screws,...More

  • Port Tool,MS16142,Reamer,9/16-18 UNF
    Port Tool,MS16142,Reamer,9/16-18 UNF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYJ7
    • Mfr. Model # MS16142-6R
    • Port Tool, Reamer Pilot, SAEJ1926, SAEJ514, O-Ring Boss, Number of Flutes 4, Tube Dia 0.375 In, Thread Size...More

  • Counterbore Set,Close Fit,7 PC,#6-1/2 In
    Counterbore Set,Close Fit,7 PC,#6-1/2 In
    • KEO
    • Item # 1DBT3
    • Mfr. Model # 55239
    • Counterbore Set, With Built-in Pilot, Nominal/Close Fit, Number of Pieces 7, Screw Size #6 to 1/2 In Socket...More

  • Counterbore Set,1/64 Clearance,7 PC
    Counterbore Set,1/64 Clearance,7 PC
    • KEO
    • Item # 1DBT4
    • Mfr. Model # 55240
    • Counterbore Set, With Built-in Pilot, 1/64 In Clearance, Number of Pieces 7, Screw Size #6 to 1/2 In Socket...More

  • Counterbore Set,1/32 Clearance,7 PC
    Counterbore Set,1/32 Clearance,7 PC
    • KEO
    • Item # 1DBT5
    • Mfr. Model # 55241
    • Counterbore Set, With Built-in Pilot, 1/32 In Clearance, Number of Pieces 7, Screw Size #6 to 1/2 In Socket...More

  • Counterbore,1/32 Clearance,Size 1/4,Co
    Counterbore,1/32 Clearance,Size 1/4,Co
  • Counterbore,Close Fit,Size #10,Cobalt
    Counterbore,Close Fit,Size #10,Cobalt
    • KEO
    • Item # 2RTN4
    • Mfr. Model # 55212
    • Counterbore, Built-in Pilot, Nominal/Close Fit, Number of Flutes 3, Screw Size #10, Socket Head Cap Screws,...More

  • Counterbore,Close Fit,Size 1/2,Cobalt
    Counterbore,Close Fit,Size 1/2,Cobalt
  • Counterbore,1/32 Clearance,Size 5/16,Co
    Counterbore,1/32 Clearance,Size 5/16,Co
  • Counterbore,1/32 Clearance,Size 1/2,Co
    Counterbore,1/32 Clearance,Size 1/2,Co
  • Counterbore,Close Fit,Size 1/4,Cobalt
    Counterbore,Close Fit,Size 1/4,Cobalt
    • KEO
    • Item # 2RTN7
    • Mfr. Model # 55215
    • Counterbore, Built-in Pilot, Nominal/Close Fit, Number of Flutes 3, Screw Size 1/4 In, Socket Head Cap...More

  • Counterbore Set,Metric,6 pcs.,3F,Medium
    Counterbore Set,Metric,6 pcs.,3F,Medium
    • KEO
    • Item # 33UV22
    • Mfr. Model # 56226
    • Counterbore Set, Built-in Pilot, Metric, Number of Pieces 6, Number of Flutes 3, Tube Dia. (In.) 1-1/2,...More

  • Port Tool,MS33649,Solid,3/4-16 UNJF
    Port Tool,MS33649,Solid,3/4-16 UNJF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYP1
    • Mfr. Model # MS33649-8S
    • Port Tool, Solid Pilot, AS5202, Number of Flutes 4, Tube Dia 0.500 In, Thread Size 0.7500-16UNJF-3B, Spot...More

  • Port Tool,MS16142,Solid,1/2-20 UNF
    Port Tool,MS16142,Solid,1/2-20 UNF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYJ6
    • Mfr. Model # MS16142-5S
    • Port Tool, Solid Pilot, SAEJ1926, SAEJ514, O-Ring Boss, Number of Flutes 4, Tube Dia 0.312 In, Thread Size...More

  • Port Tool,RPT,Reamer,7/32-28 UNJF
    Port Tool,RPT,Reamer,7/32-28 UNJF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYP6
    • Mfr. Model # RPT-2
    • Port Tool, Rosan Cavity, Reamer Pilot, PS10035, Number of Flutes 3, Tube Dia 0.125 In, Thread Size...More

  • Port Tool,MS33649,Reamer,13/16-16 UNJ
    Port Tool,MS33649,Reamer,13/16-16 UNJ
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYP2
    • Mfr. Model # MS33649-9R
    • Port Tool, Reamer Pilot, AS5202, Number of Flutes 4, Tube Dia 0.562 In, Thread Size 0.8125-16UNJ-3B, Spot...More

  • Port Tool,RPT,Reamer,5/16-24 UNJF
    Port Tool,RPT,Reamer,5/16-24 UNJF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYP9
    • Mfr. Model # RPT-4
    • Port Tool, Rosan Cavity, Reamer Pilot, PS10035, Number of Flutes 3, Tube Dia 0.250 In, Thread Size...More

  • Port Tool,MS33649,Solid,1 1/16-12 UNJ
    Port Tool,MS33649,Solid,1 1/16-12 UNJ
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYK7
    • Mfr. Model # MS33649-12S
    • Port Tool, Solid Pilot, AS5202, Number of Flutes 4, Tube Dia 0.750 In, Thread Size 1.0625-12UNJ-3B, Spot Face...More

  • Port Tool,MS16142,Reamer,1 5/8-12 UN
    Port Tool,MS16142,Reamer,1 5/8-12 UN
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYH2
    • Mfr. Model # MS16142-20R
    • Port Tool, Reamer Pilot, SAEJ1926, SAEJ514, O-Ring Boss, Number of Flutes 4, Tube Dia 1.250 In, Thread Size...More

  • Port Tool,MS33649,Solid,9/16-18 UNJF
    Port Tool,MS33649,Solid,9/16-18 UNJF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYN8
    • Mfr. Model # MS33649-6S
    • Port Tool, Solid Pilot, AS5202, Number of Flutes 4, Tube Dia 0.375 In, Thread Size 0.5625-18UNJF-3B, Spot...More

  • Port Tool,MS16142,Solid,7/16-20 UNF
    Port Tool,MS16142,Solid,7/16-20 UNF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYJ4
    • Mfr. Model # MS16142-4S
    • Port Tool, Solid Pilot, SAEJ1926, SAEJ514, O-Ring Boss, Number of Flutes 3, Tube Dia 0.250 In, Thread Size...More

  • Port Tool,RPT,Reamer,1 5/16-18 UNJF
    Port Tool,RPT,Reamer,1 5/16-18 UNJF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYP7
    • Mfr. Model # RPT-20
    • Port Tool, Rosan Cavity, Reamer Pilot, PS10035, Number of Flutes 4, Tube Dia 1.250 In, Thread Size...More

  • Port Tool,MS16142,Solid,3/8-24 UNF
    Port Tool,MS16142,Solid,3/8-24 UNF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYJ2
    • Mfr. Model # MS16142-3S
    • Port Tool, Solid Pilot, SAEJ1926, SAEJ514, O-Ring Boss, Number of Flutes 3, Tube Dia 0.188 In, Thread Size...More

  • Port Tool,MS33649,Solid,13/16-16 UNJ
    Port Tool,MS33649,Solid,13/16-16 UNJ
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYP3
    • Mfr. Model # MS33649-9S
    • Port Tool, Solid Pilot, AS5202, Number of Flutes 4, Tube Dia 0.562 In, Thread Size 0.8125-16UNJ-3B, Spot Face...More

  • Port Tool,MS16142,Solid,7/8-14 UNF
    Port Tool,MS16142,Solid,7/8-14 UNF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYG4
    • Mfr. Model # MS16142-10S
    • Port Tool, Solid Pilot, SAEJ1926, SAEJ514, O-Ring Boss, Number of Flutes 4, Tube Dia 0.625 In, Thread Size...More

  • Port Tool,RPT,Reamer,3/8-24 UNJF
    Port Tool,RPT,Reamer,3/8-24 UNJF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYR1
    • Mfr. Model # RPT-5
    • Port Tool, Rosan Cavity, Reamer Pilot, PS10035, Number of Flutes 3, Tube Dia 0.312 In, Thread Size...More

  • Port Tool,MS33649,Reamer,1 3/16-12 UNJ
    Port Tool,MS33649,Reamer,1 3/16-12 UNJ
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYK8
    • Mfr. Model # MS33649-14R
    • Port Tool, Reamer Pilot, AS5202, Number of Flutes 4, Tube Dia 0.875 In, Thread Size 1.1875-12UNJ-3B, Spot...More

  • Port Tool,MS33649,Solid,7/8-14 UNJF
    Port Tool,MS33649,Solid,7/8-14 UNJF
    • SCIENTIFIC CUTTING TOOLS
    • Item # 4XYK3
    • Mfr. Model # MS33649-10S
    • Port Tool, Solid Pilot, AS5202, Number of Flutes 4, Tube Dia 0.625 In, Thread Size 0.8750-14UNJF-3B, Spot...More

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Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order. More