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    6 Products

    Built-in-Pilot Counterbores

    A pilot centers these counterbores and prevents wobbling for an accurate cut on the first try. With dimensions that match standard screw-head diameters and thread diameters, they are your plug-and-play option for pilot-driven counterbores.
    Metric counterbores have undersized pilots to meet DIN standards.
    High-Speed SteelAbout High-Speed Steel
    Image of Product. Front orientation. ZoomedIn view. Counterbores. Built-in-Pilot Counterbores.
    Durable and wear resistant, these counterbores make accurate cuts in most materials without chipping or cracking.
    Pilot
    Shank
    Uncoated
    For Screw
    Size
    Body Dia.,
    mm
    Dia.,
    mm
    Lg.
    Overall
    Lg.
    Dia.
    Type
    No. of
    Flutes
    Mfr.
    Each
    M4
    8.03.30.197"2 3/4"3/16"Round
    3Dormer Pramet2919A27000000
    M5
    10.04.20.217"3 1/8"5/16"Round
    3Dormer Pramet2919A2800000
    M6
    11.05.00.236"3 1/8"5/16"Round
    3Dormer Pramet2919A2900000
    M8
    15.06.80.315"3 7/8"1/2"Round
    3Dormer Pramet2919A9700000
    M10
    18.08.50.394"3 7/8"1/2"Round
    3Dormer Pramet2919A9800000
    M12
    20.010.20.394"3 7/8"1/2"Round
    3Dormer Pramet2919A9900000
     
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