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  • Brand: Cat
    Inch, Coarse Thread UNC
    Availability
    Brand
    Cat
    • Screw Length - A (in)
      1
    • Thread Size (in - TPI) (in)
      1/4 - 20
    • Screw Type
      Machine Screws - Flat Head
    • Drive Type
      Hex Socket
    • Thread
      Coarse Thread UNC
    • Screw Length - A (in)
      1
    • Thread Size (in - TPI) (in)
      1/4 - 20
    Compare
  • Brand: Cat
    Inch, Coarse Thread UNC
    Availability
    Brand
    Cat
    • Screw Length - A (in)
      3 3/4
    • Thread Size (in - TPI) (in)
      1/4 - 20
    • Screw Type
      Machine Screws - Flat Head
    • Drive Type
      Hex Socket
    • Thread
      Coarse Thread UNC
    • Screw Length - A (in)
      3 3/4
    • Thread Size (in - TPI) (in)
      1/4 - 20
    Compare
  • Brand: Cat
    Inch, Coarse Thread UNC
    Availability
    Brand
    Cat
    • Screw Length - A (in)
      5/8
    • Thread Size (in - TPI) (in)
      5/16 - 18
    • Screw Type
      Machine Screws - Flat Head
    • Thread
      Coarse Thread UNC
    • Drive Type
      Hex Socket
    • Screw Length - A (in)
      5/8
    • Thread Size (in - TPI) (in)
      5/16 - 18
    Compare
  • Brand: Cat
    Inch, Coarse Thread UNC
    Availability
    Brand
    Cat
    • Screw Length - A (in)
      1/2
    • Thread Size (in - TPI) (in)
      No. 10 - 24
    • Screw Type
      Set Screws - Cup Point
    • Thread
      Coarse Thread UNC
    • Screw Length - A (in)
      1/2
    • Thread Size (in - TPI) (in)
      No. 10 - 24
    Compare
  • Brand: Cat
    Inch, Coarse Thread UNC
    Availability
    Brand
    Cat
    • Screw Length - A (in)
      3/8
    • Thread Size (in - TPI) (in)
      1/4 - 20
    • Screw Type
      Set Screws - Cup Point
    • Thread
      Coarse Thread UNC
    • Screw Length - A (in)
      3/8
    • Thread Size (in - TPI) (in)
      1/4 - 20
    Compare
  • Brand: Cat
    Inch, Coarse Thread UNC
    Availability
    Brand
    Cat
    • Screw Length - A (in)
      3/4
    • Thread Size (in - TPI) (in)
      1/4 - 20
    • Screw Type
      Set Screws - Cup Point
    • Thread
      Coarse Thread UNC
    • Screw Length - A (in)
      3/4
    • Thread Size (in - TPI) (in)
      1/4 - 20
    Compare
  • Brand: Cat
    Inch, Coarse Thread UNC
    Availability
    Brand
    Cat
    • Screw Length - A (in)
      1/2
    • Thread Size (in - TPI) (in)
      5/16 - 18
    • Screw Type
      Set Screws - Square Head
    • Thread
      Coarse Thread UNC
    • Screw Length - A (in)
      1/2
    • Thread Size (in - TPI) (in)
      5/16 - 18
    Compare
  • Brand: Cat
    Inch, Coarse Thread UNC
    Availability
    Brand
    Cat
    • Screw Length - A (in)
      5/8
    • Thread Size (in - TPI) (in)
      5/16 - 18
    • Screw Type
      Set Screws - Square Head
    • Thread
      Coarse Thread UNC
    • Screw Length - A (in)
      5/8
    • Thread Size (in - TPI) (in)
      5/16 - 18
    Compare
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Machine Screws and Machine Screw Sets

  • Flat Head- Made of steel and finished with zinc plating.*
  • Cup Point- Heat treated with black oxide finish.
  • Square Head- Made of case-hardened steel with a full square head.
  • Pan Head- Made of steel and finished with zinc plating.*
  • Round Head- Made of steel and finished with a zinc plating.*

*Conforms to ANSI B18.6.3 standard