McMaster-Carr logo
    Filter by
    System of Measurement
    Diameter
    Attribute Image
    Specifications Met
    Industrial Info Compare
    Thread Size
    Industrial Info Compare
    Head Diameter
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    DFARS Specialty Metals
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Tolerance Rating
    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)
    85 Products

    Dowel Pins

    Precisely align machine parts and prevent movement during assembly. These dowel pins are machined to tight tolerances and have a uniform diameter for a snug fit. They can also be used as a pivot, shaft, or hinge to join moving components. Since dowel pins can be hard to remove, they are best suited for permanent fixtures that don't require frequent adjustments or disassembly.
    Steel
    Image of Product. Front orientation. Dowel Pins. Plain Head, Standard Tolerance.
    High-Strength Alloy Steel—Our strongest, most wear-resistant pins, these won't bend or break from vibration. Use them for high-stress applications, such as mounting and aligning hydraulic cylinders and injection molds. They perform best in dry environments since moisture will cause them to rust.
    Material Certificate—Pins include a report with a traceable lot number and a description of their chemical, physical, and mechanical properties.
    Lg.,
    mm
    Dia. Tolerance,
    mm
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    High-Strength Alloy Steel
     
    16 mm Diameter
    240.007 to 0.01847,000Rockwell C58DIN 6325-m6, ISO 8734—191595A89400000
    280.007 to 0.01847,000Rockwell C58DIN 6325-m6, ISO 8734—191595A9120000
    300.007 to 0.01847,000Rockwell C52DIN 6325-m6, ISO 8734—191595A8390000
    320.007 to 0.01847,000Rockwell C58DIN 6325-m6, ISO 8734—191595A9160000
    360.007 to 0.018Not RatedRockwell C52DIN 6325-m6, ISO 8734—191595A8410000
    400.007 to 0.018Not RatedRockwell C52DIN 6325-m6, ISO 8734—191595A8450000
    450.007 to 0.018Not RatedRockwell C52DIN 6325-m6, ISO 8734—191595A8490000
    500.007 to 0.018Not RatedRockwell C52DIN 6325-m6, ISO 8734Material Certificate
    		191595A8530000
    600.007 to 0.018Not RatedRockwell C52DIN 6325-m6, ISO 8734—191595A8570000
    700.007 to 0.018Not RatedRockwell C52DIN 6325-m6, ISO 8734—191595A8610000
    800.007 to 0.018Not RatedRockwell C52DIN 6325-m6, ISO 8734—191595A8650000
    900.007 to 0.018Not RatedRockwell C52DIN 6325-m6, ISO 8734—191595A86900000
    1000.007 to 0.018Not RatedRockwell C52DIN 6325-m6, ISO 8734—191595A87300000
     
    Corrosion-Resistant Stainless SteelAbout Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Dowel Pins. Plain Head, Standard Tolerance.
    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.
    Highly Corrosion-Resistant 316 Stainless Steel—Our most corrosion-resistant pins, these hold up in just about any environment. They won't degrade from exposure to weather, salt water, and most chemicals. Like 18-8 stainless steel, they're strong enough to join most components but won't withstand stress and vibration as well as steel.
    Material Certificate—Pins include a report with a traceable lot number and a description of their chemical, physical, and mechanical properties.
    Lg.,
    mm
    Dia. Tolerance,
    mm
    Double Shear Breaking
    Strength
    Min.
    Hardness
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    16 mm Diameter
    200 to 0.018Not RatedNot RatedISO 2338-m6—191585A97000000
    300.007 to 0.018Not RatedNot RatedISO 2338-m6Material Certificate
    		191585A4490000
    400.007 to 0.018Not RatedNot RatedISO 2338-m6—191585A97700000
    500.007 to 0.018Not RatedNot RatedISO 2338-m6—191585A98900000
    600.007 to 0.018Not RatedNot RatedISO 2338-m6—191585A99400000
     
    Highly Corrosion-Resistant 316 Stainless Steel
     
    16 mm Diameter
    200.007 to 0.018Not RatedNot RatedISO 2338-m6—193600A3530000
    300.007 to 0.018Not RatedNot RatedISO 2338-m6—193600A3540000
    400.007 to 0.018Not RatedNot RatedISO 2338-m6—193600A35500000
    500.007 to 0.018Not RatedNot RatedISO 2338-m6—193600A35600000
     

    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

    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.
    Head,
    mm
    Usable
    Lg., mm
    Dia. Tolerance,
    mm
    For Max. Cotter
    Pin Dia., mm
    Min.
    Hardness
    Lg.,
    mm
    Dia.
    Ht.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    16 mm Diameter
    31-0.110 to 0.0004Rockwell B6740255193131A610000000
    41-0.110 to 0.0004Rockwell B6750255193131A62000000
    51-0.110 to 0.0004Rockwell B6760255193131A63000000
    58-0.110 to 0.0004Rockwell B6765255193131A72000000
     

    Slotted Spring Pins

    Image of Product. Front orientation. Spring Pins. Slotted Spring Pins.
    Image of Product. End View. Side1 orientation. Spring Pins. Slotted Spring Pins.

    End View

    Squeeze these pins into holes and they expand slightly, creating tension to hold parts in place. They are often used as hinge pins and as fasteners for springs and power transmission components. An alternative to dowel pins, they're lighter in weight with a hollow center and don’t need a precise hole. Also known as roll pins.
    Spring Steel—These pins won't deform from stress and vibration. Although they're stronger than stainless steel, they're best for dry environments since moisture will cause them to rust.
    Lg.,
    mm
    For Hole
    Dia., mm
    Wall Thk.,
    mm
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Spring Steel
     
    16 mm Diameter
    10161.522,000Rockwell C42DIN 7346, ISO 133371097161A275000000
    12161.522,000Rockwell C42DIN 7346, ISO 13337597161A2760000
    14161.522,000Rockwell C42DIN 7346, ISO 13337197161A2770000
    16161.522,000Rockwell C42DIN 7346, ISO 13337197161A2780000
    18161.522,000Rockwell C42DIN 7346, ISO 13337197161A2790000
    20161.522,000Rockwell C42DIN 7346, ISO 13337597161A28000000
    22161.522,000Rockwell C42DIN 7346, ISO 13337197161A2810000
    24161.522,000Rockwell C42DIN 7346, ISO 13337197161A2820000
    26161.522,000Rockwell C42DIN 7346, ISO 13337197161A2830000
    28161.522,000Rockwell C42DIN 7346, ISO 13337597161A28400000
    30161.522,000Rockwell C42DIN 7346, ISO 13337197161A2850000
    32161.522,000Rockwell C42DIN 7346, ISO 13337197161A2860000
    36161.522,000Rockwell C42DIN 7346, ISO 13337197161A2870000
    40161.522,000Rockwell C42DIN 7346, ISO 13337197161A2880000
    45161.522,000Rockwell C42DIN 7346, ISO 13337197161A28900000
    50161.522,000Rockwell C42DIN 7346, ISO 13337197161A2900000
    55161.522,000Rockwell C42DIN 7346, ISO 13337197161A2910000
    60161.522,000Rockwell C42DIN 7346, ISO 13337197161A2920000
    70161.522,000Rockwell C42DIN 7346, ISO 13337197161A2930000
    120161.522,000Rockwell C42DIN 7346, ISO 13337197161A29400000
     

    Strong-Hold Ring-Grip Quick-Release Pins

    A second retaining ball gives these pins more holding power than standard ring-grip pins. They resist loosening from vibration but require a strong tug to pull them out. Good for tight spaces, the split ring folds down out of the way when installed, and you can grab it with one finger to remove. Attach a lanyard to keep pins from getting lost, or add tags to identify components.
    Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Contains Annotated. Quick-Release Pins. Strong-Hold Ring-Grip Quick-Release Pins.
    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. They resist rust in wet and outdoor environments but won't hold up to the harsh chemicals and acids that 316 stainless steel can.
    Usable
    Lg., mm
    Dia. at Extended
    Ball Ht., mm
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Handle
    Material
    Ball Material
    Each
    High-Strength 17-4 PH Stainless Steel
     
    16 mm Diameter
    1518.5461,800Rockwell C40Stainless Steel
    		Stainless Steel
    		95165A636000000
    2518.5461,800Rockwell C40Stainless Steel
    		Stainless Steel
    		95165A63700000
    4018.5461,800Rockwell C40Stainless Steel
    		Stainless Steel
    		95165A63800000
    5018.5461,800Rockwell C40Stainless Steel
    		Stainless Steel
    		95165A63900000
    6018.5461,800Rockwell C40Stainless Steel
    		Stainless Steel
    		95165A64000000
    8018.5461,800Rockwell C40Stainless Steel
    		Stainless Steel
    		95165A64100000
    9018.5461,800Rockwell C40Stainless Steel
    		Stainless Steel
    		95165A64200000
    10018.5461,800Rockwell C40Stainless Steel
    		Stainless Steel
    		95165A64300000
     

    T-Handle Locking Quick-Release Pins

    The widest grip gives you the most leverage. These pins are the easiest to grab with gloved or slippery hands but take up the most space when installed. They have two retaining balls that lock the pin in place until you push the button to insert and remove.
    Corrosion-Resistant Stainless Steel with Split Ring
    Image of Product. Front orientation. Contains Annotated. Quick-Release Pins. T-Handle Locking Quick-Release Pins, Split Ring, Aluminum Handle.

    Aluminum Handle

    Secure the split ring to a lanyard to keep pins from getting lost, or attach tags to identify components.
    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. They resist rust in wet and outdoor environments but won't hold up to the harsh chemicals and acids that 316 stainless steel can.
    Usable
    Lg., mm
    Dia. at Extended
    Ball Ht., mm
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Handle
    Color
    Ball Material
    Each
    High-Strength 17-4 PH Stainless Steel with Aluminum Handle
     
    16 mm Diameter
    501957,500Rockwell C40BlackStainless Steel
    		93680A465000000
    751957,500Rockwell C40BlackStainless Steel
    		93680A47000000
     

    Pull-Out Dowel Pins

    Remove pins even when you only have access to one end or they sit flush with the surface of your part. With one internally threaded end, they are easier to remove than most dowel pins. Thread a screw into the pin and then pull with the removal tool (sold separately). You can also pull the screw with pliers, but there’s more risk of damaging the hole.
    Steel
    Image of Product. Front orientation. Dowel Pins. Standard Tolerance, Tapped Head, Pull-Out Removal.
    High-Strength Alloy Steel—Our strongest, most wear-resistant pins, these won't bend or break from vibration. Use them for high-stress applications, such as mounting and aligning hydraulic cylinders and injection molds. They perform best in dry environments since moisture will cause them to rust.
    Each
    Lg.,
    mm
    Dia. Tolerance,
    mm
    Thread Size
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Specs. Met
    1-49
    50-199
    200-Up
    High-Strength Alloy Steel
     
    16 mm Diameter
    320.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m697355A563000000000000000
    360.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m697355A567000000000000
    400.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m697355A571000000000000
    500.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m697355A579000000000000
    600.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m697355A587000000000000
    700.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m697355A591000000000000
     
    Pin Removal Tools
    Each
    Puller Handle92330A300000000
    Tip for 3/4"-1-1/2" (13-20 mm) Diameter Pin92330A51100000
    Extension (5 1/2" Overall Length)92330A22000000

    Loop-Grip Clevis Pins with Toggle

    Image of Product. Front orientation. Contains Annotated. Clevis Pins. Loop-Grip Clevis Pins with Toggle.
    For components you need to lock in place but also disconnect frequently, these pins have a toggle end and large loop handle. No need for a separate cotter pin, the toggle swivels so you can insert into a hole and then swivels back to secure. Fold down the handle to save space when installed.
    Steel
    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.
    Usable
    Lg., mm
    Dia. Tolerance,
    mm
    Min.
    Hardness
    Handle
    Finish
    Each
    Zinc-Plated Carbon Steel
     
    16 mm Diameter
    90-0.110 to 0Rockwell B70Zinc Plated97141A716000000
     

    Ejector Pins

    Image of Product. Front orientation. Ejector Pins. Ejector Pins.
    Also known as knockout and forged pins, use these pins to push parts out of molds. Pins are precision-ground to tight tolerances and hardened for strength and wear resistance. Machining is not recommended. Metric pins meet DIN 1530 specifications.
    Nitride-Coated H13 Tool Steel
    H13 tool steel pins resist rapid changes in temperature.
    Head,
    mm
    Dia.,
    mm
    Dia. Tolerance,
    mm
    Dia.
    Ht.
    Min.
    Hardness
    Each
     
    160 mm Long
    16.0000-0.017 to -0.006227Rockwell C4193217A940000000
     
    250 mm Long
    16.0000-0.017 to -0.006227Rockwell C4193217A95000000
     
    400 mm Long
    16.0000-0.017 to -0.006227Rockwell C4193217A97000000
     

    Vented Pull-Out Dowel Pins

    Insert and remove from blind holes with less effort than pins that aren't vented. The vent relieves trapped air, so pressure doesn't create resistance as you install the pin. Because they have a tapped end, you can thread in a screw and pull the pin out with a removal tool (sold separately). You can also pull using pliers, but there’s more risk of damaging the hole.
    Flat Shaft
    Image of Product. Front orientation. Dowel Pins. Tapped Head, Pull-Out Removal, Vented, Standard Tolerance, Flat Shaft.
    The flat side of these pins creates a vent that's less likely to be blocked than a spiral shaft, but doesn’t offer quite as strong of a hold.
    High-Strength Alloy Steel—Our strongest, most wear-resistant pins, these won't bend or break from vibration. Use them for high-stress applications, such as mounting and aligning hydraulic cylinders and injection molds. They perform best in dry environments since moisture will cause them to rust.
    Lg.,
    mm
    Dia. Tolerance,
    mm
    Thread Size
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Specs. Met
    Each
    High-Strength Alloy Steel
     
    16 mm Diameter
    320.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m698432A38200000
    400.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m698432A3860000
    500.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m698432A3900000
    600.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m698432A3940000
    700.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m698432A3980000
    800.007 to 0.018M8 × 1.25 mm33,500Rockwell C52DIN 7979D-m698432A4020000
     
    Pin Removal Tools
    Each
    Puller Handle92330A300000000
    Tip for 3/4"-1-1/2" (13-20 mm) Diameter Pin92330A51100000
    Extension (5 1/2" Overall Length)92330A22000000

    Flat-Head Quick-Release Pins

    With no ring or handle to get caught on nearby components, these pins won’t pull out accidentally. The low profile makes them similar to basic clevis pins. Although the thin head fits in cramped spots, it also makes the pin harder to grab. A retaining ball holds pins in place once installed—pull to remove.
    Steel
    Image of Product. Front orientation. Contains Annotated. Quick-Release Pins. Flat-Head Quick-Release 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.
    Head,
    mm
    Usable
    Lg., mm
    Dia. at Extended
    Ball Ht., mm
    Dia.
    Ht.
    Single Shear Breaking
    Strength
    Min.
    Hardness
    Ball Material
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Carbon Steel
     
    16 mm Diameter
    2418255Not RatedRockwell B60Stainless Steel
    		190156A62800000
    3418255Not RatedRockwell B60Stainless Steel
    		190156A6290000
    4418255Not RatedRockwell B60Stainless Steel
    		190156A6310000
     

    Hollow Dowel Pins

    Image of ProductInUse. Front orientation. Dowel Pins. Hollow Shaft, Plain Head, Standard Tolerance.
    Image of Product. Front orientation. Dowel Pins. Hollow Shaft, Plain Head, Standard Tolerance.
    Align parts and bolt them together using the same hole. Install the pin and then insert a bolt or screw through the center. You can also use these pins to route wires and tubing without the need to drill a separate hole. Hollow pins are lighter than solid pins, so they’re a good choice if you need to reduce weight in your assembly.
    Steel
    Low-Carbon Steel—These pins won't deform from stress and vibration. They're stronger than stainless steel but not quite as strong as alloy steel. Pins perform best in dry environments since moisture will cause them to rust.
    Lg.,
    mm
    Dia. Tolerance,
    mm
    Double Shear Breaking
    Strength
    Min.
    Hardness
    Wall Thk.,
    mm
    Pkg.
    Qty.
    Pkg.
    Low-Carbon Steel
     
    16 mm Diameter
    200.007 to 0.018Not RatedNot Rated2.4197184A47000000
    240.007 to 0.018Not RatedNot Rated2.4197184A4800000
    300.007 to 0.018Not RatedNot Rated2.4197184A4900000
     

    Press-Fit Locating and Support Buttons

    Image of Product. Front orientation. Contains Annotated. Locating and Support Buttons. Press-Fit Locating and Support Buttons.
    Support and position workpieces and fixtures from the bottom or side. These buttons press into a drilled hole for permanent installation. Also known as rest buttons.
    Stud,
    mm
    Tolerance,
    mm
    Dia.,
    mm
    Lg.,
    mm
    Dia.
    Lg.
    Lg.
    Stud
    Dia.
    Specs.
    Met
    Each
    Steel
    168812-0.036 to 00 to 0.04DIN 63213097N13000000
     

    Screw-Mount Locating and Support Buttons

    Image of Product. Front orientation. Locating and Support Buttons. Screw-Mount Locating and Support Buttons.
    Image of Product. Flat Head. Top orientation. ZoomedIn view. Contains Border. Locating and Support Buttons. Screw-Mount Locating and Support Buttons.

    Flat Head

    Also known as rest buttons, these buttons support workpieces and fixtures from the bottom or side. Mount them onto a screw or stud extending from your jig or table.
    Round—Round buttons have an unthreaded, counterbored through hole. Mount them to a socket head cap screw.
    Dia.,
    mm
    Lg.,
    mm
    Lg. Tolerance,
    mm
    For Mounting
    Screw Size
    Mounting Fasteners
    Included
    Each
    Steel—Round with Flat Head
    1612-0.03 to 0.03M5
    		No3070N1300000
     

    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.
    Cone Supports
    Image of ProductInUse. Front orientation. Coordinate Measuring Machine Plates and Fixtures. Fixturing for Parts Inspection, Cone Supports.
    Image of Product. Front orientation. Coordinate Measuring Machine Plates and Fixtures. Fixturing for Parts Inspection, Cone Supports.
    Cone supports have a round pointed tip to minimize contact with your workpiece, so they’re often used to prop up delicate parts. They’re also useful for parts with irregular surfaces that slide off larger supports. Made of plastic, they’re nonmarring.
    Dia.,
    mm
    Ht.,
    mm
    Thread
    Lg., mm
    Material
    Each
    M6 × 1 mm Threads
    16139.6Nylon1409N7100000
     
    M8 × 1.25 mm Threads
    16137.7Nylon1409N720000
     
    back to top