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    103 Products

    Wide-Rim Shims

    Image of Product. Front orientation. Shims. Round, Wide Rim, Sold Individually.
    Spread loads across a wider surface area than standard shims to minimize costly wear between components. With thickness tolerances as fine as a strand of hair, these shims precisely align, space, and level components on shafts, arbors, and machinery.
    You can stack multiple shims to achieve your exact thickness, but stacking more than four may cause them to shift. Remember, fewer shims are better, so a couple of thicker shims are more stable than a bunch of thin shims.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these shims resist rust. However, they’ll corrode or pit when exposed to salt water and chemicals.
    Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these shims won't degrade when exposed to harsh weather, salt water, and most chemicals.
    Carbon Steel—Best for dry environments since moisture will cause these shims to rust.
    Zinc-Plated Carbon Steel—A common choice for areas with occasional exposure to moisture.
    Thk.
    Thk. Tolerance
    ID Tolerance
    OD Tolerance
    Min.
    Hardness
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1/2" ID × 7/8" OD
    0.048"-0.007" to 0.007"-0.01" to 0.01"-0.005" to 0.025"Rockwell B205000000000000000
     
    9/16" ID × 1" OD
    0.048"-0.007" to 0.007"0.01" to 0.025"-0.01" to 0.01"Rockwell B3850000000000000
     
    5/8" ID × 1 1/4" OD
    0.048"-0.007" to 0.007"-0.01" to 0.01"-0.005" to 0.025"Rockwell B20500000000000000
     
    3/4" ID × 1 1/4" OD
    0.048"-0.007" to 0.007"-0.01" to 0.01"-0.005" to 0.025"Rockwell B20500000000000000
     
    3/4" ID × 1 1/2" OD
    0.048"-0.007" to 0.007"-0.01" to 0.01"-0.005" to 0.025"Rockwell B20500000000000000
     
    1" ID × 1 1/2" OD
    0.048"-0.007" to 0.007"0.01" to 0.025"-0.01" to 0.01"Rockwell B3850000000000000
     
    1" ID × 2" OD
    0.048"-0.007" to 0.007"-0.01" to 0.01"-0.005" to 0.025"Rockwell B2010000000000000
     
    Highly Corrosion-Resistant 316 Stainless Steel
     
    1/2" ID × 7/8" OD
    0.048"-0.007" to 0.007"0.01" to 0.025"-0.01" to 0.01"Rockwell B38100000000000000
     
    5/8" ID × 1 1/4" OD
    0.048"-0.007" to 0.007"0.01" to 0.025"-0.01" to 0.01"Rockwell B38100000000000000
     
    3/4" ID × 1 1/2" OD
    0.048"-0.007" to 0.007"0.01" to 0.025"-0.01" to 0.01"Rockwell B3850000000000000
     
    1" ID × 2" OD
    0.048"-0.007" to 0.007"0.01" to 0.025"-0.01" to 0.01"Rockwell B3850000000000000
     
    Carbon Steel
     
    1/4" ID × 5/8" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    3/8" ID × 3/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    1/2" ID × 7/8" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    9/16" ID × 1" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    5/8" ID × 1" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    5/8" ID × 1 1/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    3/4" ID × 1 1/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    3/4" ID × 1 1/2" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    7/8" ID × 1 3/8" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    7/8" ID × 1 3/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    1" ID × 1 1/2" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    1" ID × 2" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B382500000000000000
     
    1 1/8" ID × 1 3/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    1 1/4" ID × 1 7/8" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B382500000000000000
     
    1 1/4" ID × 2 1/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B382500000000000000
     
    1 3/8" ID × 2 1/8" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B382500000000000000
     
    1 1/2" ID × 2 1/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B382500000000000000
     
    1 1/2" ID × 3" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38100000000000000
     
    1 3/4" ID × 2 1/2" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B382500000000000000
     
    2" ID × 3 1/2" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38500000000000000
     
    Zinc-Plated Carbon Steel
     
    1/4" ID × 5/8" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    3/8" ID × 3/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    1/2" ID × 7/8" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    9/16" ID × 1" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    5/8" ID × 1" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    5/8" ID × 1 1/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    3/4" ID × 1 1/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    3/4" ID × 1 1/2" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    7/8" ID × 1 3/8" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    1" ID × 1 1/2" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    1" ID × 2" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    1 1/8" ID × 1 3/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    1 1/4" ID × 1 7/8" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38250000000000000
     
    1 3/8" ID × 2 1/8" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38100000000000000
     
    1 1/2" ID × 2 1/4" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B38100000000000000
     
    2" ID × 3" OD
    0.048"-0.006" to 0.006"0.01" to 0.025"-0.01" to 0.01"Rockwell B3850000000000000
     

    Shims

    Image of Product. Front orientation. Shims. Sold Individually, Round.
    With thickness tolerances as fine as a strand of hair, these shims precisely align, space, and level components on shafts, arbors, and machinery.
    You can stack multiple shims to achieve your exact thickness, but stacking more than four may cause them to shift. Remember, fewer shims are better, so a couple of thicker shims are more stable than a bunch of thin shims.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these shims resist rust. However, they’ll corrode or pit when exposed to salt water and chemicals.
    Thk.
    Thk. Tolerance
    ID
    Tolerance
    OD Tolerance
    Min.
    Hardness
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1/4" ID × 3/8" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    5/16" ID × 1/2" OD
    0.048"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240500000000000000
     
    11/32" ID × 13/16" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240100000000000000
     
    3/8" ID × 5/8" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    1/2" ID × 3/4" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240100000000000000
     
    5/8" ID × 1" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    3/4" ID × 1 1/8" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    7/8" ID × 1 3/8" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    1" ID × 1 1/2" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240500000000000000
     
    1 1/8" ID × 1 5/8" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24050000000000000
     
    1 1/4" ID × 1 3/4" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24050000000000000
     
    1 3/8" ID × 1 7/8" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240500000000000000
     
    1 1/2" ID × 2 1/8" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240500000000000000
     
    1 3/4" ID × 2 3/4" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24010000000000000
     
    2" ID × 2 3/4" OD
    0.048"-0.0035" to 0.0035"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24010000000000000
     

    Peel-Away Multilayer Shim Stock

    Image of ProductInUse. Front orientation. Shim Stock. Multilayer, Sold Individually, Peel Away.
    Fine-tune thickness without worrying about stacking multiple shims. Cut the shim stock into custom shapes that suit your needs. It's made of layers of material bonded with adhesive—peel off the layers with a utility knife until you reach your desired thickness. To make peeling easier, warm the created shims to soften the adhesive. With thickness tolerances as fine as a strand of hair, the shims will precisely align, space, and level components on dies, presses, and machinery.
    18-8 Stainless Steel—The choice for wet and outdoor areas because it resists rust. However, it will corrode or pit when exposed to salt water and chemicals.
    Carbon Steel—Best for dry areas since moisture will cause it to rust.
    Aluminum—An alternative to stainless steel for rust resistance but less hard so it may not retain its shape. One-third the weight of steel, it's often used in robotics and automation.
    Brass—Picked for its warm, polished look. Similar to 18-8 stainless steel, it resists rusting in wet and outdoor areas.
    Polyimide—Originally designed for military aircraft, it’s used in everything from aerospace to electronics where weight, electrical insulation, and precision are vital.
    Temper Rating—Choose half hard to create shims that you’ll need to bend or shape. Opt for full hard to make stronger shims that will maintain their shape under loads.
    Certificate
    Thk.
    Thk. Tolerance
    No. of
    Layers
    Layer
    Thk.
    Temper
    Rating
    Type
    Form
    Specs. Met
    Form
    Each
    18-8 Stainless Steel
     
    12" Wide × 12" Long
    0.048"-0.002" to 0.005"160.003"———SAE AMS-DTL-22499Sheet00000000000000
    0.048"-0.002" to 0.005"240.002"———SAE AMS-DTL-22499Sheet0000000000000
     
    20" Wide × 24" Long
    0.048"-0.002" to 0.005"160.003"———SAE AMS-DTL-22499Sheet0000000000000
    0.048"-0.002" to 0.005"240.002"———SAE AMS-DTL-22499Sheet0000000000000
     
    Carbon Steel
     
    12" Wide × 12" Long
    0.048"-0.002" to 0.005"160.003"———Fed. Spec. QQ-S-698, SAE AMS-DTL-22499Sheet000000000000
    0.048"-0.002" to 0.005"240.002"———Fed. Spec. QQ-S-698, SAE AMS-DTL-22499Sheet000000000000
     
    20" Wide × 24" Long
    0.048"-0.002" to 0.005"160.003"———Fed. Spec. QQ-S-698, SAE AMS-DTL-22499Sheet0000000000000
    0.048"-0.002" to 0.005"240.002"———Fed. Spec. QQ-S-698, SAE AMS-DTL-22499Sheet0000000000000
     
    Aluminum
     
    12" Wide × 12" Long
    0.048"-0.002" to 0.005"160.003"Full Hard——SAE AMS-DTL-22499Sheet000000000000
    0.048"-0.002" to 0.005"240.002"Full Hard——SAE AMS-DTL-22499Sheet000000000000
     
    Brass
     
    8" Wide × 24" Long
    0.048"-0.002" to 0.005"240.002"1/2 Hard——SAE AMS-DTL-22499Sheet0000000000000
     
    12" Wide × 12" Long
    0.048"-0.002" to 0.005"240.002"1/2 Hard——SAE AMS-DTL-22499Sheet0000000000000
     
    Polyimide
     
    12" Wide × 12" Long
    0.048"-0.002" to 0.005"230.002"—Material Certificate
    		Paper
    		ASTM D5213, SAE AMS-DTL-22499Sheet0000000000000
     

    Clamp Holding Washers

    Image of ProductInUse. Front orientation. Contains Border. Clamp Holding Washers.
    Image of Product. Front orientation. Contains Annotated. Clamp Holding Washers.
    Use on clamps with open arms to keep the holding screw in place.
    302 Stainless Steel—302 stainless steel washers provide better corrosion resistance than steel washers.
    For Screw
    Size
    ID
    OD
    Wd. of
    Flat
    Thk.
    Overall
    Ht.
    Washer
    Type
    Each
    Steel
    No. 8
    		0.172"0.438"5/16"0.048"0.090"Angled Edge000000000000
    No. 10
    		0.203"0.563"3/8"0.048"0.090"Angled Edge00000000000
     
    302 Stainless Steel
    No. 8
    		0.172"0.438"5/16"0.048"0.090"Angled Edge00000000000
    No. 10
    		0.203"0.563"3/8"0.048"0.090"Angled Edge00000000000
     

    Peel-Away Multilayer Made-to-Order Shims

    Image of Product. Front orientation. Shims. Multilayer, Sold Individually, Made-to-Order, Peel Away.
    If you need a unique peel-away shim shape or size, we’ll precision cut it for you. Use these shims to fine-tune thickness without worrying about stacking multiple shims. They're made of metal layers bonded with adhesive—peel off the layers with a utility knife until you reach your desired thickness. To make peeling easier, warm the shims to soften the adhesive. With thickness tolerances as fine as a strand of hair, all of these shims precisely align, space, and level components on shafts, arbors, and machinery.
    Send your dimensioned DWG, DXF, IGES, or STEP file to sales@mcmaster.com. Please leave at least 1/8" wall between shim edge and holes. Minimum hole size is 1/4". Shims should be no smaller than 1" × 1" square or 1" OD. Maximum shim dimension is the largest overall length, width, or diameter of your custom shim.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these shims resist rust. However, they’ll corrode or pit when exposed to salt water and chemicals.
    Carbon Steel—Best for dry environments since moisture will cause these shims to rust.
    Aluminum—These shims are an alternative to stainless steel for rust resistance but aren't as hard so they may not retain their shape as well. One-third the weight of steel, they’re commonly used in robotics and automation.
    Brass—With a warm, polished look, these shims are often chosen for their appearance. Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments.
    Material Certificate—Shims include a report with a traceable lot number.
    2" × 2" Maximum
    Shim Size
    5" × 5" Maximum
    Shim Size
    7" × 7" Maximum
    Shim Size
    11" × 11" Maximum
    Shim Size
    23" × 23" Maximum
    Shim Size
    Thk.
    Thk. Tolerance
    No. of
    Layers
    Layer
    Thk.
    Min.
    Hardness
    Certificate Type
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Pkg.
    Qty.
    Pkg.
    Pkg.
    Qty.
    Pkg.
    Pkg.
    Qty.
    Pkg.
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    0.048"-0.0024" to 0.0024"240.002"Rockwell B80Material Certificate
    		ASTM A24016000000000000000040000000000000000900000000000000004000000000000000010000000000000000
     
    Carbon Steel
    0.048"-0.0024" to 0.0024"240.002"Rockwell B54Material Certificate
    		Fed. Spec. QQ-S-698160000000000000004000000000000000900000000000000040000000000000001000000000000000
     
    Aluminum
    0.048"-0.0024" to 0.0024"240.002"Not RatedMaterial Certificate
    		ASTM B209, SAE AMS-DTL-224991600000000000000400000000000000900000000000000040000000000000001000000000000000
     
    Brass
    0.048"-0.0024" to 0.0024"240.002"Not RatedMaterial Certificate
    		ASTM B36160000000000000004000000000000000900000000000000040000000000000001000000000000000
     

    Shims for Keyed Shafts

    With a notch or tab, these shims fit snugly on keyed shafts to align and space gears, sprockets, and bearings. On keyed arbors, they’re often used to accurately space saw blades and cutters.
    You can stack multiple shims to achieve your exact thickness, but stacking more than four may cause them to shift. Remember, fewer shims are better, so a couple of thicker shims are more stable than a bunch of thin shims.
    Notch
    Image of Product. Front orientation. Shims. For Keyed Shafts, Sold Individually, Round, Notch.
    Fit these shims around keyed shafts and arbors that have a key inserted. They’re often referred to as arbor spacers.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these shims resist rust. However, they’ll corrode or pit when exposed to salt water and chemicals.
    Notch
    Thk.
    Thk. Tolerance
    ID
    ID
    Tolerance
    OD
    OD Tolerance
    Wd.
    Dp.
    Min.
    Hardness
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    For 1" Diameter Shafts
    0.048"-0.0035" to 0.0035"1"0" to 0.011"1 1/2"-0.002" to 0.002"1/4"3/32"Rockwell B805000000000000000
     
    For 1 1/4" Diameter Shafts
    0.048"-0.0035" to 0.0035"1 1/4"0" to 0.011"1 3/4"-0.002" to 0.002"5/16"1/8"Rockwell B80500000000000000
     
    For 1 1/2" Diameter Shafts
    0.048"-0.0035" to 0.0035"1 1/2"0" to 0.011"2 1/8"-0.002" to 0.002"3/8"5/32"Rockwell B80500000000000000
     
    For 2" Diameter Shafts
    0.048"-0.0035" to 0.0035"2"0" to 0.011"2 3/4"-0.002" to 0.002"1/2"3/16"Rockwell B80500000000000000
     
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