McMaster-Carr logo
    Filter by
    System of Measurement
    Diameter
    Attribute Image
    Drill Bit Size
    Attribute Image
    Shape
    DFARS Specialty Metals
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Tolerance Rating
    Appearance
    Application
    Elongation
    Maximum Temperature
    Minimum Temperature
    Yield Strength
    Industrial Info Snippet
    Mechanical Finish
    Hardness Rating
    Heat Treatment
    Shaft Type
    Groove Location
    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)
    3 Products
    About Steel
    industrial info icon

    Compare over 50 grades of steel and cast iron to find the right material for you—all with material certificates for traceability.

    Undersized Hardened Multipurpose M2 High-Speed Tool Steel Rods

    Image of Product. Front orientation. Steel. Undersized Hardened Multipurpose M2 High-Speed Tool Steel Rods.
    These rods, also known as drill blanks, have an undersized diameter for machining your own drill bits. They're hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Dia.,
    mm
    Dia. Tolerance,
    mm
    Drill Bit
    Size, mm
    Lg.
    Yield
    Strength
    Hardness
    Mechanical
    Finish
    Each
    4.15-0.005 to 04.15
    		3 1/4"Not RatedRockwell C60 (Extra Hard)Precision Ground2900A28200000

    Partially Grooved Dowel Pins

    The grooved section secures these pins while the smooth portion is free to act as a pivot or hinge. The grooves pinch shut when installed, creating tension to lock in place. They fit tighter than standard dowel pins and resist pulling from movement and vibration, even in imperfect holes.
    For the best fit, drill your hole slightly larger than the nominal diameter shown.
    Center Grooved
    Image of ProductInUse. Front orientation. Dowel Pins. Plain Head, Standard Tolerance, Partially Grooved, Center Grooved.
    Image of Product. Front orientation. Dowel Pins. Plain Head, Standard Tolerance, Partially Grooved, Center Grooved, Parallel Groove.

    Parallel Groove

    These pins lock in the middle, leaving two smooth ends free. They're often used to create a T-handle, such as on a valve stem to open and close it by hand. Also known as type E pins.
    Zinc-Plated Carbon Steel—These pins withstand occasional exposure to moisture. However, since friction from moving parts can wear away the finish, they're not ideal for wet environments. While not nearly as corrosion resistant as stainless steel, they are stronger and won’t deform under stress.
    Parallel Groove—Fit tighter than pins with tapered grooves to stay in place under severe vibration. However, they require more force to insert.
    Nominal,
    mm
    Max., mm
    Lg.,
    mm
    Dia.
    Dia.
    Tolerance
    Dia.
    Dia.
    Tolerance
    Groove
    Type
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Groove
    Lg., mm
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    4 mm Diameter
    164-0.075 to 04.15-0.05 to 0.05Parallel2,500Rockwell B685.33ISO 8742105430N12100000
    184-0.075 to 04.15-0.05 to 0.05Parallel2,500Rockwell B686ISO 8742105430N1220000
     
    back to top