McMaster-Carr logo
    Filter by
    System of Measurement
    Diameter
    Attribute Image
    Pin Type
    Cotter Pin Type
    Shaft Type
    End Shape
    Groove Type
    Specifications Met
    Fastener Head Type
    Groove Length
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Industrial Info Compare
    End Type
    For Use With
    Groove Coverage
    Groove Location
    Double Shear Breaking Strength
    Tolerance Rating
    Passivation
    Minimum Hardness
    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)
    18 Products

    Cotter Pins

    Lock the ends of clevis pins and shafts to keep components in place. Slide these cotter pins into a hole and then bend the prongs outward with pliers to secure. Also known as split pins, one prong is slightly longer than the other for easy opening once inserted. Repeated bending will weaken the pin, so they should not be reused.
    Steel
    Image of Product. Front orientation. Contains Annotated. Cotter Pins. Cotter Pins.
    Zinc-Plated Spring 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.
    Lg.,
    mm
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Spring Steel
     
    6.3 mm Diameter
    40DIN 94, ISO 12341000000000000000
    50DIN 94, ISO 1234100000000000000
    56DIN 94, ISO 1234100000000000000
    63DIN 94, ISO 1234100000000000000
    71DIN 94, ISO 12341000000000000000
    80DIN 94, ISO 12341000000000000000
    90DIN 94, ISO 12341000000000000000
    100DIN 94, ISO 12341000000000000000
     
    Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Contains Annotated. Cotter Pins. Cotter Pins.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these pins resist rusting. They are strong enough to join most components but won't withstand extreme stress and vibration as well as steel.
    Lg.,
    mm
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    6.3 mm Diameter
    32DIN 94, ISO 12345000000000000000
    40DIN 94, ISO 1234500000000000000
    45DIN 94, ISO 1234500000000000000
    50DIN 94, ISO 1234500000000000000
    56DIN 94, ISO 1234500000000000000
    63DIN 94, ISO 1234500000000000000
    90DIN 94, ISO 1234500000000000000
     

    Fully Grooved Dowel Pins

    With a tighter fit than standard dowel pins, these resist pulling from movement and vibration, even in imperfect holes. Three grooves pinch shut when installed, creating tension to lock in place. Also known as Type A pins.
    For the best fit, drill your hole slightly larger than the nominal diameter shown.
    Steel
    Image of Product. Front orientation. Dowel Pins. Standard Tolerance, Plain Head, Fully Grooved, Parallel Groove.

    Parallel Groove

    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
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    6 mm Diameter
    206-0.075 to 06.3-0.05 to 0.05Parallel5,700Rockwell B68ISO 87401000000000000000
     

    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.
    Half Grooved
    Image of ProductInUse. Front orientation. Dowel Pins. Standard Tolerance, Partially Grooved, Plain Head, Half Grooved.
    Image of Product. Front orientation. Dowel Pins. Standard Tolerance, Partially Grooved, Plain Head, Half Grooved, Tapered Groove.

    Tapered Groove

    The most versatile partially grooved pins, these are used in a range of applications, including as rod end linkages, stop pins, and locators. Also known as type H 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.
    Tapered Groove—Easier to install than pins with parallel grooves but less secure in high-vibration applications.
    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
     
    6 mm Diameter
    126-0.075 to 06.3-0.05 to 0.05Tapered5,700Rockwell B686ISO 874510000000000000000
    206-0.075 to 06.3-0.05 to 0.05Tapered5,700Rockwell B6810ISO 87451000000000000000
     
    back to top