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    15 Products

    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. Standard Tolerance, Partially Grooved, Plain Head, Center Grooved.
    Image of Product. Front orientation. Dowel Pins. Standard Tolerance, Partially Grooved, Plain Head, 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
     
    2 mm Diameter
    122-0.025 to 02.10 to 0.05Parallel600Rockwell B684ISO 8742100000000000000
     
    2.5 mm Diameter
    242.5-0.025 to 02.65-0.05 to 0.05Parallel950Rockwell B688ISO 874210000000000000
     
    3 mm Diameter
    123-0.025 to 03.1-0.05 to 0.05Parallel1,400Rockwell B684ISO 874210000000000000
    143-0.025 to 03.1-0.05 to 0.05Parallel1,400Rockwell B684.66ISO 874210000000000000
    163-0.025 to 03.1-0.05 to 0.05Parallel1,400Rockwell B685.33ISO 874210000000000000
    223-0.025 to 03.15-0.05 to 0.05Parallel1,400Rockwell B687.33ISO 874210000000000000
    243-0.025 to 03.15-0.05 to 0.05Parallel1,400Rockwell B688ISO 874210000000000000
     
    4 mm Diameter
    164-0.075 to 04.15-0.05 to 0.05Parallel2,500Rockwell B685.33ISO 874210000000000000
    184-0.075 to 04.15-0.05 to 0.05Parallel2,500Rockwell B686ISO 874210000000000000
    244-0.075 to 04.2-0.05 to 0.05Parallel2,500Rockwell B688ISO 874210000000000000
     
    5 mm Diameter
    225-0.075 to 05.2-0.05 to 0.05Parallel3,950Rockwell B687.33ISO 8742100000000000000
    265-0.075 to 05.2-0.05 to 0.05Parallel3,950Rockwell B688.66ISO 8742100000000000000
    325-0.075 to 05.25-0.05 to 0.05Parallel3,950Rockwell B6810.66ISO 8742100000000000000
     
    6 mm Diameter
    286-0.075 to 06.25-0.05 to 0.05Parallel5,700Rockwell B689.33ISO 8742100000000000000
     
    8 mm Diameter
    328-0.09 to 08.25-0.05 to 0.05Parallel10,150Rockwell B6810.66ISO 874250000000000000
     
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