McMaster-Carr logo
    Filter by
    System of Measurement
    Screw Size
    Industrial Info Compare
    Drill Bit Size
    Industrial Info Compare
    Attribute Image
    For Wood Type
    Countersink Angle
    Industrial Info Snippet
    Attribute Image
    Sold As
    Number of Countersinking Ends
    Length Class
    Industrial Info Snippet
    Number of Flutes
    Flute Type
    Finish
    Shank Size
    Thread Pitch
    Industrial Info Snippet
    Attribute Image
    Body Diameter
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Length
    DFARS Specialty Metals
    For Hole Type
    Chamfer Type
    Overall Length
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    5 Products
    About Countersinks
    industrial info icon

    Choose the right countersink angle, body diameter, and number of flutes for your application.

    Quick-Change Hex Drill-Bit Countersinks for Wood and Plastic

    Switch bits instead of tools to simplify jobs. These snap directly into drills, power screwdrivers, and other tools that accept a 1/4" hex shank. You can slide the countersink up and down the drill bit and then secure it with a set screw, so one tool will drill countersunk holes for screws of different lengths. These countersinks cut a smooth and even finish in wood and plastic on the first pass.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. For Cutting Screw Holes, Drill-Bit Countersink, For Wood, Straight Flute, Quick-Change Hex Shank, Sold Individually, 1 Countersinking End, 2 Flutes.

    2 Flutes

    The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.
    Countersinks
    Replacement
    Drill Bits
    For
    Screw Size
    Uncoated
    Body
    Dia.
    Max. Hole
    Drilling Dp.
    Hard
    Wood
    Soft
    Wood
    Overall
    Lg.
    Shank
    Size
    Shank Type
    Each
    Each
    2 Flutes
     
    82° Countersink Angle
    1/2"1"No. 6
    		No. 8
    		2 27/32"1/4"Quick-Change Hex000000000000000000000000
     

    Drill Taps

    Image of Product. Front orientation. Drill Taps. Drill Taps, Spiral Flute.

    Spiral Flute

    Drill holes and cut threads without switching tools. Made of high-speed steel, these taps are for use on most metal and plastic. The square shank is compatible with tap holders for drill presses and milling machines. All have a plug chamfer with 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping.
    Uncoated High-Speed Steel—Uncoated taps are strong enough for most tapping jobs but have the shortest tool life.
    Spiral Flute—Taps with spiral flutes keep chips clear by drawing them back toward the tap and out of the hole.
    Thread
    Drill Bit
    Plug Chamfer
    Size
    Lg.
    Overall
    Lg.
    Size,
    mm
    Decimal Size
    Equiv.
    Point
    Angle
    Flute
    Type
    No. of
    Flutes
    Thread
    Type
    Pitch Dia.
    Limit
    Each
    Uncoated High-Speed Steel
    5/16"-18
    		15/16"2 27/32"F
    		0.257"110°Spiral2UNC
    		H30000000000000
    5/16"-24
    		15/16"2 27/32"I
    		0.272"110°Spiral2UNF
    		H3000000000000
    M8 × 1.25 mm15/16"2 27/32"6.7
    		0.2637"110°Spiral2Metric
    		D5000000000000
     
    back to top