McMaster-Carr logo
    Filter by
    System of Measurement
    Diameter
    Attribute Image
    Knurl Location
    Fastener Head Type
    Knurl Length
    Pin Type
    End Type
    Groove Type
    Head Diameter
    Knurl Coverage
    Tolerance Rating
    Groove Location
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    DFARS Specialty Metals
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    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)
    15 Products

    Partially Knurled Dowel Pins

    A section of knurls around the entire diameter of these pins make better contact with the hole than partially grooved pins. The knurls resist both pulling and twisting that can displace the pin and damage the hole, while the smooth portion acts as a hinge or pivot.
    Half Knurled
    Image of ProductInUse. Front orientation. Dowel Pins. Partially Knurled, Plain Head, Standard Tolerance, Half Knurled.
    Image of Product. Front orientation. Dowel Pins. Partially Knurled, Plain Head, Standard Tolerance, Half Knurled.
    The most versatile partially knurled 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.
    Nominal
    Max.
    Lg.
    Dia.
    Dia.
    Tolerance
    Dia.
    Dia. Tolerance
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Knurl
    Lg.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    1/8" Diameter
    1/2"0.125"-0.002" to 0"0.133"-0.002" to 0.002"1,600Not Rated1/4"595896A110000000
    3/4"0.125"-0.002" to 0"0.133"-0.002" to 0.002"1,600Not Rated3/8"595896A12000000
    1"0.125"-0.002" to 0"0.133"-0.002" to 0.002"1,600Not Rated1/2"595896A13000000
     
    Center Knurled
    Image of ProductInUse. Front orientation. Dowel Pins. Partially Knurled, Plain Head, Standard Tolerance, Center Knurled.
    Image of Product. Front orientation. Dowel Pins. Partially Knurled, Plain Head, Standard Tolerance, Center Knurled.
    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.
    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.
    Nominal
    Max.
    Lg.
    Dia.
    Dia.
    Tolerance
    Dia.
    Dia. Tolerance
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Knurl
    Lg.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    1/8" Diameter
    1/2"0.125"-0.002" to 0"0.133"-0.002" to 0.002"1,600Not Rated1/4"596008A110000000
    3/4"0.125"-0.002" to 0"0.133"-0.002" to 0.002"1,600Not Rated3/8"596008A12000000
    1"0.125"-0.002" to 0"0.133"-0.002" to 0.002"1,600Not Rated1/2"596008A13000000
     

    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. Plain Head, Standard Tolerance, Fully Grooved, Tapered Groove.

    Tapered 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.
    Tapered Groove—Easier to install than pins with parallel grooves but less secure in high-vibration applications.
    Nominal
    Max.
    Lg.
    Dia.
    Dia.
    Tolerance
    Dia.
    Dia. Tolerance
    Groove
    Type
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    1/8" Diameter
    1"0.125"-0.002" to 0"0.133"-0.003" to 0.003"Tapered1,600Not Rated2598400A114000000
     
    Corrosion-Resistant Stainless SteelAbout Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Dowel Pins. Plain Head, Standard Tolerance, Fully Grooved, Tapered Groove.

    Tapered Groove

    18-8 Stainless Steel—The choice for wet and outdoor environments. In addition to resisting rust, these pins also withstand mild chemicals such as cleaners and degreasers. They are strong enough to join most components but won't withstand extreme stress and vibration as well as steel.
    Tapered Groove—Easier to install than pins with parallel grooves but less secure in high-vibration applications.
    Nominal
    Max.
    Lg.
    Dia.
    Dia.
    Tolerance
    Dia.
    Dia. Tolerance
    Groove
    Type
    Double Shear Breaking
    Strength
    Min.
    Hardness
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1/8" Diameter
    1"0.125"-0.002" to 0"0.133"-0.003" to 0.003"TaperedNot RatedNot Rated1098400A604000000
     

    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. Plain Head, Standard Tolerance, Partially Grooved, Half Grooved.
    Image of Product. Back orientation. Dowel Pins. Plain Head, Standard Tolerance, Partially Grooved, Half Grooved, Parallel Groove.

    Parallel 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.
    Parallel Groove—Fit tighter than pins with tapered grooves to stay in place under severe vibration. However, they require more force to insert.
    Nominal
    Max.
    Lg.
    Dia.
    Dia.
    Tolerance
    Dia.
    Dia. Tolerance
    Groove
    Type
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Groove
    Lg.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    1/8" Diameter
    1"0.125"-0.002" to 0"0.133"-0.003" to 0.003"Parallel1,600Not Rated1/2"2598400A325000000
     
    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
    Max.
    Lg.
    Dia.
    Dia.
    Tolerance
    Dia.
    Dia. Tolerance
    Groove
    Type
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Groove
    Lg.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    1/8" Diameter
    1"0.125"-0.002" to 0"0.133"-0.003" to 0.003"Parallel1,600Not Rated1/2"2598400A239000000
     
    Quarter Grooved
    Image of ProductInUse. Front orientation. Dowel Pins. Plain Head, Standard Tolerance, Partially Grooved, Quarter Grooved.
    Image of Product. Front orientation. Dowel Pins. Plain Head, Standard Tolerance, Partially Grooved, Quarter Grooved, Parallel Groove.

    Parallel

    Groove

    With a longer smooth end than half-grooved dowel pins, these are often used for thicker pivoting parts, such as levers and hinges. Also known as type C 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
    Max.
    Lg.
    Dia.
    Dia.
    Tolerance
    Dia.
    Dia. Tolerance
    Groove
    Type
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Groove
    Lg.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    1/8" Diameter
    1"0.125"-0.002" to 0"0.133"-0.003" to 0.003"Parallel1,600Not Rated1/4"2598400A005000000
     

    Partially Grooved Dowel Pins with Notch

    Slip a spring into the notch at the end of the pin. Often used in automated machinery such as conveyors and robotic arms, the pin anchors the spring in place to create tension between components. The grooved section pinches shut when installed to lock the pin in place. Grooved pins have a tighter fit than standard dowel pins and resist pulling from movement and vibration.
    For the best fit, drill your hole slightly larger than the nominal diameter shown.
    Half Grooved
    Image of ProductInUse. Front orientation. Dowel Pins. Partially Grooved, Standard Tolerance, Notch Head, Half Grooved.
    Image of Product. Front orientation. Dowel Pins. Partially Grooved, Standard Tolerance, Notch Head, Half Grooved.
    Also known as type G 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
    Max.
    Lg.
    Dia.
    Dia.
    Tolerance
    Dia.
    Dia. Tolerance
    Groove
    Type
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Groove
    Lg.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    1/8" Diameter
    1"0.125"-0.002" to 0"0.133"-0.003" to 0.003"Parallel1,600Not Rated1/2"2598400A364000000
     

    Core Pins

    Mold plastic around these pins to form small holes, or use them to perforate parts. They have a flat head to fit into a counterbored hole. Pins can be machined to fit your application. They're precision-ground to tight tolerances.
    M2 High-Speed Tool SteelAbout M2 High-Speed Tool Steel
    Image of Product. Front orientation. Core Pins. Core Pins.
    M2 high-speed tool steel pins resist wear and stay sharp at high temperatures.
    Head
    Each
    Dia.
    Dia.
    Tolerance
    Dia.
    Ht.
    Min.
    Hardness
    1-9
    10-99
    100-Up
    2 1/2" Long
    0.133"0" to 0.0002"13/64"1/8"Rockwell C6098378A127000000000000000
     
    4" Long
    0.133"0" to 0.0003"13/64"1/8"Rockwell C6098378A112000000000000000
     
    6" Long
    0.133"0" to 0.0003"13/64"1/8"Rockwell C6098378A177000000000000000
     
    back to top