McMaster-Carr logo
    Filter by
    System of Measurement
    Diameter
    Attribute Image
    Fastener Head Type
    Industrial Info Compare
    Overall Length
    Pin Type
    Body Shape
    Point Diameter
    Through-Hole Diameter
    DFARS Specialty Metals
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    For Maximum Cotter Pin Diameter
    Sold As
    Shaft Type
    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)
    20 Products

    Clevis Pins

    The most commonly used clevis pins—just slide a cotter pin into the hole to secure parts. These pins have a flat, low-profile head to fit in tight spaces. They're less likely to get in the way than pins with a loop grip or T-handle but aren’t as easy to grab if you want to remove them frequently. Add your own cotter pin, or choose a clevis pin that includes a reusable hairpin cotter.
    Steel
    Image of Product. Front orientation. Contains Annotated. Clevis Pins. Clevis Pins, Cotter Pin Not Included.

    Cotter Pin Not

    Included

    Carbon Steel—Stronger than stainless steel, these pins won't deform from stress and vibration. They perform best in dry environments since moisture will cause them to rust.
    Head
    Usable
    Lg.
    Dia. Tolerance
    For Max.
    Cotter Pin Dia.
    Min.
    Hardness
    Lg.
    Dia.
    Ht.
    Pkg.
    Qty.
    Pkg.
    Carbon Steel
     
    1 1/8" Diameter
    2 3/8"-0.020" to 0.000"3/16"Rockwell B633"1 3/8"25/64"100000000000000
    3 3/8"-0.020" to 0.000"3/16"Rockwell B634"1 13/32"13/32"100000000000000
    4 3/8"-0.020" to 0.000"3/16"Rockwell B635"1 13/32"13/32"100000000000000
    5 3/8"-0.020" to 0.000"3/16"Rockwell B636"1 13/32"13/32"100000000000000
    7 3/8"-0.020" to 0.000"3/16"Rockwell B638"1 3/8"25/64"100000000000000
    8 3/8"-0.020" to 0.000"3/16"Rockwell B639"1 3/8"25/64"100000000000000
     
    Heat-Treated Steel
    Image of Product. Front orientation. Contains Annotated. Clevis Pins. Clevis Pins, Cotter Pin Not Included.

    Cotter Pin Not

    Included

    With additional hardness, these pins are less likely to bend, break, and wear than those that aren't heat treated.
    Carbon Steel—Stronger than stainless steel, these pins won't deform from stress and vibration. They perform best in dry environments since moisture will cause them to rust.
    Galvanized Carbon Steel—These pins combine the strength of steel with the rust resistance of stainless steel. They're often used as an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals.
    Head
    Usable
    Lg.
    Dia. Tolerance
    For Max.
    Cotter Pin Dia.
    Min.
    Hardness
    Lg.
    Dia.
    Ht.
    Pkg.
    Qty.
    Pkg.
    Carbon Steel
     
    1 1/8" Diameter
    3 13/16"-0.013" to 0.000"3/16"Rockwell C254 1/4"1 5/8"3/8"1000000000000000
     
    Galvanized Carbon Steel
     
    1 1/8" Diameter
    3 13/16"-0.013" to 0.000"3/16"Rockwell C254 1/4"1 5/8"3/8"100000000000000
     
    Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Contains Annotated. Clevis Pins. Clevis Pins, Cotter Pin Not Included.

    Cotter Pin Not

    Included

    18-8 Stainless Steel—The choice for wet and outdoor environments, these pins resist rusting. They're strong enough to fasten most components but won't withstand stress and vibration as well as steel.
    Head
    Usable
    Lg.
    Dia. Tolerance
    For Max.
    Cotter Pin Dia.
    Min.
    Hardness
    Lg.
    Dia.
    Ht.
    Each
    18-8 Stainless Steel
     
    1 1/8" Diameter
    2 3/8"-0.004" to -0.002"3/16"Rockwell B803"1 3/8"11/32"000000000000000
    3 3/8"-0.004" to -0.002"3/16"Rockwell B804"1 3/8"11/32"00000000000000
     

    Nonsparking Alignment Pins

    Image of Product. Front orientation. Contains Annotated. Alignment Pins. Nonsparking Alignment Pins.
    Made from aluminum bronze that is Factory Mutual approved, these nonmagnetic, corrosion-resistant pins inhibit sparking. They satisfy OSHA requirements for nonsparking tools for locations where flammable vapors and combustible residues are present. Nonsparking tools are not, however, classified as antistatic because they do conduct electricity. Use alignment pins to align structural components such as I-beams and angle irons for bolting, riveting, and welding.
    Note: Do not use these tools in direct contact with acetylene.
    Body
    Point
    Dia.
    Taper
    Lg.
    Dia.
    Overall
    Lg.
    Shape
    Texture
    Each
    Aluminum Bronze
    1/2"6"1 1/8"10"RoundSmooth0000000000000
     

    Fixturing for Parts Inspection

    Image of ProductInUse. Front orientation. Coordinate Measuring Machine Plates and Fixtures. Fixturing for Parts Inspection.
    From towers and brackets to standoffs and supports, these components are the building blocks for your custom fixturing setup. They elevate parts so you can access a variety of angles for measuring and inspecting while protecting your measuring device from hitting the inspection table. You’ll often see them used with coordinate measuring machines (CMMs). They’re not for use in machining applications.
    Adjustable-Height Sleeves
    Image of ProductInUse. Front orientation. Coordinate Measuring Machine Plates and Fixtures. Fixturing for Parts Inspection, Adjustable-Height Sleeves.
    Image of Product. Front orientation. Coordinate Measuring Machine Plates and Fixtures. Fixturing for Parts Inspection, Adjustable-Height Sleeves.
    Adjustable-height sleeves convert standoffs with a fixed height into standoffs with an adjustable height. Slide them over your 1/2" diameter standoff and move the sleeve up or down to set your desired height. Lock them in place with the thumb screw.
    For Standoff
    Dia.
    Dia.
    Ht.
    Material
    Includes
    Each
    1/4"-20 Threads
    1/2"1 1/8"2"Acetal1/4"-20 Knurled Knob0000000000000
     

    Tethered Loop-Grip Clevis Pins

    A lanyard or chain prevents your pin from getting lost when removed. With a large loop handle that's easy to grip and pull, these clevis pins are often used for towing and other applications where you regularly secure and release components.
    Steel
    Image of Product. With Cotter Pin and Lanyard. Front orientation. Contains Annotated. Clevis Pins. Tethered Loop-Grip Clevis Pins, Cotter Pin Included, , Black, Red Handle.
    Image of Product. With Cotter Pin and Lanyard. Front orientation. Contains Annotated. Clevis Pins. Tethered Loop-Grip Clevis Pins, , Cotter Pin Included.
    Image of Product. With Linch Pin and Chain. Front orientation. Contains Annotated. Clevis Pins. Tethered Loop-Grip Clevis Pins, , Linch Pin Included.

    With Cotter Pin and Lanyard

    With Cotter Pin and Lanyard

    With Linch Pin and Chain

    Painted Carbon Steel—Stronger than stainless steel, these pins won't deform from stress and vibration. The dark enamel creates a finished look but offers minimal corrosion resistance. They're best for dry environments.
    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.
    Zinc-Yellow-Chromate-Plated Carbon Steel—With a more durable finish than clear zinc plating, these pins hold up in wet and outdoor environments although not as well as stainless steel. Because the plating resists wear and the steel holds up under stress, they're good for pivoting parts, like rod end linkages.
    Cotter Pin Included—The hairpin cotter is quicker to install and remove than a linch pin but not as secure.
    Linch Pin Included—Less likely to get knocked or shaken out of place than a hairpin, the linch pin has a ring that snaps down and locks.
    Usable
    Lg.
    Dia. Tolerance
    For Max.
    Cotter Pin Dia.
    Min.
    Hardness
    Head
    Dia.
    Handle
    Color
    Each
    Zinc-Plated Carbon Steel with Cotter Pin and Lanyard
     
    1 1/8" Diameter
    7"-0.016" to 0.016"3/16"Rockwell C192"—000000000000000
     
    Zinc-Yellow-Chromate-Plated Carbon Steel with Cotter Pin and Lanyard
     
    1 1/8" Diameter
    7"-0.016" to 0.016"3/16"Rockwell C192"—00000000000000
     
    Zinc-Yellow-Chromate-Plated Carbon Steel with Linch Pin and Chain
     
    1 1/8" Diameter
    7"-0.012" to 0.000"9/32"Rockwell C281 3/4"—00000000000000
     
    Black-Painted Carbon Steel with Cotter Pin and Lanyard
     
    1 1/8" Diameter
    8 1/2"-0.003" to 0.002"17/64"Rockwell C32—Red00000000000000
    12"-0.003" to 0.002"11/64"Rockwell C32—Red00000000000000
     
    Corrosion-Resistant Stainless Steel
    Image of Product. With Cotter Pin and Lanyard. Front orientation. Contains Annotated. Clevis Pins. Tethered Loop-Grip Clevis Pins, Cotter Pin Included, .

    With Cotter Pin and Lanyard

    Image of Product. With Linch Pin and Chain. Front orientation. Contains Annotated. Clevis Pins. Tethered Loop-Grip Clevis Pins, , Linch Pin Included.

    With Linch Pin and Chain

    High-Strength 17-4 PH Stainless Steel—The strongest stainless steel pins we offer, these are the least likely to deform due to stress and vibration. Similar to 18-8 stainless steel, they're suitable for most wet and outdoor environments. However, they won't hold up to the harsh conditions and chemicals that 316 stainless steel can.
    Cotter Pin Included—The hairpin cotter is quicker to install and remove than a linch pin but not as secure.
    Linch Pin Included—Less likely to get knocked or shaken out of place than a hairpin, the linch pin has a ring that snaps down and locks.
    Usable
    Lg.
    Dia. Tolerance
    For Max.
    Cotter Pin Dia.
    Min.
    Hardness
    Head
    Dia.
    Each
    High-Strength 17-4 PH Stainless Steel with Cotter Pin and Lanyard
     
    1 1/8" Diameter
    7"-0.016" to 0.016"3/16"Rockwell B802"000000000000000
     
    High-Strength 17-4 PH Stainless Steel with Linch Pin and Chain
     
    1 1/8" Diameter
    7"-0.016" to 0.016"17/64"Rockwell B802"00000000000000
     

    Clevis Pins with Locking Retainer

    Secure and release these heavy duty pins with one hand. Swing the welded solid steel retainer closed, and it locks onto the pin until you press the lever to open. Unlike other clevis pins, you don’t have to reach around to insert a cotter pin or worry about it falling out. These are often used for towing since they make it easy to hitch and unhitch your equipment.
    Steel
    Image of Product. Back orientation. Contains Annotated. Clevis Pins. Clevis Pins with Locking Retainer.
    Image of Product. Front orientation. Clevis Pins. Clevis Pins with Locking Retainer.
    Powder-Coated Carbon Steel—A shiny black finish creates a barrier against rust in damp and outdoor environments. While not as corrosion resistant as stainless steel, these pins are stronger and won't deform under stress.
    Dia.
    Usable
    Lg.
    Dia. Tolerance
    Retainer
    Clearance
    Min.
    Hardness
    Lg.
    Each
    Black-Powder-Coated Carbon Steel
     
    Square-Retainer
    1 1/8"7"-0.003" to 0.010"3 7/8"Rockwell C3211"000000000000000
     
    back to top