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    123 Products

    Shims

    Image of Product. Front orientation. Shims. Round, Sold Individually.
    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.
    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.
    Copper—Good conductors of heat, these shims are often used when installing heat sinks. As our softest metal shims, they prevent damage to equipment and components but may not retain their shape as well as other metal shims.
    Thk.
    Thk. Tolerance
    ID
    Tolerance
    OD Tolerance
    Min.
    Hardness
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1/32" ID × 7/64" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—25000000000000000
     
    3/64" ID × 1/8" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—2500000000000000
     
    1/16" ID × 5/32" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—2500000000000000
     
    5/64" ID × 5/32" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—2500000000000000
     
    3/32" ID × 13/64" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—2500000000000000
     
    1/8" ID × 3/16" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—2500000000000000
     
    3/16" ID × 1/4" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—2500000000000000
     
    1/4" ID × 3/8" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—2500000000000000
     
    5/16" ID × 1/2" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—2500000000000000
     
    3/8" ID × 9/16" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—2500000000000000
     
    3/8" ID × 5/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    1/2" ID × 3/4" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—2500000000000000
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240100000000000000
     
    5/8" ID × 1" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    3/4" ID × 1 1/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    7/8" ID × 1 3/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    1" ID × 1 1/2" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    1 1/8" ID × 1 5/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240500000000000000
     
    1 1/4" ID × 1 3/4" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    1 3/8" ID × 1 7/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240500000000000000
     
    1 1/2" ID × 2 1/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240500000000000000
     
    1 3/4" ID × 2 3/4" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24010000000000000
     
    2" ID × 2 3/4" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24010000000000000
     
    Highly-Corrosion-Resistant 316 Stainless Steel
     
    3/32" ID × 13/64" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B90—1000000000000000
     
    1/8" ID × 3/16" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B90—1000000000000000
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24050000000000000
     
    3/16" ID × 1/4" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B90—1000000000000000
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24050000000000000
     
    1/4" ID × 3/8" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B90—1000000000000000
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240100000000000000
     
    5/16" ID × 1/2" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B90—1000000000000000
     
    5/16" ID × 19/32" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240100000000000000
     
    11/32" ID × 13/16" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240100000000000000
     
    3/8" ID × 9/16" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B90—1000000000000000
     
    3/8" ID × 5/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240100000000000000
     
    1/2" ID × 3/4" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B90—1000000000000000
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240100000000000000
     
    5/8" ID × 1" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    3/4" ID × 1 1/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240500000000000000
     
    7/8" ID × 1 3/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    1" ID × 1 1/2" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240500000000000000
     
    1 1/8" ID × 1 5/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    1 1/4" ID × 1 3/4" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401000000000000000
     
    1 3/8" ID × 1 7/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24050000000000000
     
    1 1/2" ID × 2 1/8" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24050000000000000
     
    1 3/4" ID × 2 3/4" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24050000000000000
     
    2" ID × 2 3/4" OD
    0.016"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A24050000000000000
     
    Aluminum
     
    1/4" ID × 3/8" OD
    0.016"-0.0015" to 0.0015"0" to 0.011"-0.002" to 0.002"Not Rated—100000000000000
     
    3/8" ID × 5/8" OD
    0.016"-0.0015" to 0.0015"0" to 0.011"-0.002" to 0.002"Not Rated—1000000000000000
     
    1/2" ID × 3/4" OD
    0.016"-0.0015" to 0.0015"0" to 0.011"-0.002" to 0.002"Not Rated—1000000000000000
     
    5/8" ID × 1" OD
    0.016"-0.0015" to 0.0015"0" to 0.011"-0.002" to 0.002"Not Rated—1000000000000000
     
    3/4" ID × 1 1/8" OD
    0.016"-0.0015" to 0.0015"0" to 0.011"-0.002" to 0.002"Not Rated—1000000000000000
     
    1" ID × 1 1/2" OD
    0.016"-0.0015" to 0.0015"0" to 0.011"-0.002" to 0.002"Not Rated—1000000000000000
     
    Brass
     
    3/32" ID × 13/64" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—100000000000000
     
    1/8" ID × 3/16" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—100000000000000
     
    3/16" ID × 1/4" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—100000000000000
     
    1/4" ID × 3/8" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—1000000000000000
     
    5/16" ID × 1/2" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—1000000000000000
     
    3/8" ID × 9/16" OD
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—1000000000000000
     
    3/8" ID × 5/8" OD
    0.016"-0.0025" to 0.0025"0" to 0.011"-0.002" to 0.002"Rockwell B60ASTM B361000000000000000
     
    1/2" ID × 3/4" OD
    0.016"-0.0025" to 0.0025"0" to 0.011"-0.002" to 0.002"Rockwell B60ASTM B361000000000000000
    0.016"-0.002" to 0.002"0" to 0.005"-0.005" to 0.005"Rockwell B70—1000000000000000
     
    5/8" ID × 1" OD
    0.016"-0.0025" to 0.0025"0" to 0.011"-0.002" to 0.002"Rockwell B60ASTM B361000000000000000
     
    3/4" ID × 1 1/8" OD
    0.016"-0.0025" to 0.0025"0" to 0.011"-0.002" to 0.002"Rockwell B60ASTM B361000000000000000
     
    1" ID × 1 1/2" OD
    0.016"-0.0025" to 0.0025"0" to 0.011"-0.002" to 0.002"Rockwell B60ASTM B3650000000000000
     
    Copper
     
    1/4" ID × 3/8" OD
    0.016"-0.001" to 0.001"0" to 0.011"-0.002" to 0.002"Not RatedASTM B1521000000000000000
     
    3/8" ID × 5/8" OD
    0.016"-0.001" to 0.001"0" to 0.011"-0.002" to 0.002"Not RatedASTM B1521000000000000000
     
    1/2" ID × 3/4" OD
    0.016"-0.001" to 0.001"0" to 0.011"-0.002" to 0.002"Not RatedASTM B1521000000000000000
     
    5/8" ID × 1" OD
    0.016"-0.001" to 0.001"0" to 0.011"-0.002" to 0.002"Not RatedASTM B1521000000000000000
     
    3/4" ID × 1 1/8" OD
    0.016"-0.001" to 0.001"0" to 0.011"-0.002" to 0.002"Not RatedASTM B1521000000000000000
     
    1" ID × 1 1/2" OD
    0.016"-0.001" to 0.001"0" to 0.011"-0.002" to 0.002"Not RatedASTM B152500000000000000
     

    Peel-Away Multilayer Shim Stock

    Image of ProductInUse. Front orientation. Shim Stock. Peel Away, Sold Individually, Multilayer.
    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
    0.016"-0.001" to 0.0015"80.002"———SAE AMS-DTL-22499Sheet0000000000000
     
    20" Wide × 24" Long
    0.016"-0.001" to 0.0015"80.002"———SAE AMS-DTL-22499Sheet0000000000000
     
    Carbon Steel
     
    12" Wide × 12" Long
    0.016"-0.001" to 0.0015"80.002"———Fed. Spec. QQ-S-698, SAE AMS-DTL-22499Sheet000000000000
     
    20" Wide × 24" Long
    0.016"-0.001" to 0.0015"80.002"———Fed. Spec. QQ-S-698, SAE AMS-DTL-22499Sheet000000000000
     
    Aluminum
     
    12" Wide × 12" Long
    0.016"-0.001" to 0.0015"50.003"Full Hard——SAE AMS-DTL-22499Sheet000000000000
    0.016"-0.001" to 0.0015"80.002"Full Hard——SAE AMS-DTL-22499Sheet000000000000
     
    Brass
     
    8" Wide × 24" Long
    0.016"-0.001" to 0.0015"80.002"1/2 Hard——SAE AMS-DTL-22499Sheet000000000000
     
    Polyimide
     
    12" Wide × 12" Long
    0.016"-0.001" to 0.0015"80.002"—Material Certificate
    		Paper
    		ASTM D5213, SAE AMS-DTL-22499Sheet0000000000000
     

    Shims for Lengthening Screw Shoulders

    Image of ProductInUse. Front orientation. Contains Annotated. Shims. Round, Sold Individually, Shoulder Lengthening.
    Image of Product. Front orientation. Shims. Round, Sold Individually, Shoulder Lengthening.
    When shoulders come up short, use these shims to extend the shoulder length on your screw. Wiggle the shims over the threads and up to the existing shoulder to create the exact shoulder length you need. Use them to create more space for bearings, pulleys, and sprockets, or extend the length of travel along the shoulder.
    You can stack multiple shims to achieve the exact shoulder length or space you need.
    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.
    Thk.
    Thk. Tolerance
    For Screw
    Size
    ID
    ID
    Tolerance
    OD
    OD Tolerance
    Min.
    Hardness
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    For 1/4" Diameter Shoulder
    0.016"-0.002" to 0.002"No. 10
    		0.171"0" to 0.011"0.241"-0.002" to 0.002"Rockwell B7050000000000000000
     
    For 5/16" Diameter Shoulder
    0.016"-0.002" to 0.002"1/4"
    		0.234"0" to 0.011"0.303"-0.002" to 0.002"Rockwell B70250000000000000
     
    For 3/8" Diameter Shoulder
    0.016"-0.002" to 0.002"5/16"
    		0.289"0" to 0.011"0.365"-0.002" to 0.002"Rockwell B702500000000000000
     
    For 1/2" Diameter Shoulder
    0.016"-0.002" to 0.002"3/8"
    		0.352"0" to 0.011"0.491"-0.002" to 0.002"Rockwell B702500000000000000
     
    For 5/8" Diameter Shoulder
    0.016"-0.002" to 0.002"1/2"
    		0.473"0" to 0.011"0.616"-0.002" to 0.002"Rockwell B702500000000000000
     
    Highly-Corrosion-Resistant 316 Stainless Steel
     
    For 1/4" Diameter Shoulder
    0.016"-0.002" to 0.002"No. 10
    		0.171"0" to 0.011"0.241"-0.002" to 0.002"Rockwell B701000000000000000
     
    For 5/16" Diameter Shoulder
    0.016"-0.002" to 0.002"1/4"
    		0.234"0" to 0.011"0.303"-0.002" to 0.002"Rockwell B701000000000000000
     
    For 3/8" Diameter Shoulder
    0.016"-0.002" to 0.002"5/16"
    		0.289"0" to 0.011"0.365"-0.002" to 0.002"Rockwell B701000000000000000
     
    For 1/2" Diameter Shoulder
    0.016"-0.002" to 0.002"3/8"
    		0.352"0" to 0.011"0.491"-0.002" to 0.002"Rockwell B701000000000000000
     

    Shims for Shortening Screw Shoulders

    Image of ProductInUse. Front orientation. Contains Annotated. Shims. Sold Individually, Shoulder Shortening, Round.
    Image of Product. Front orientation. Shims. Sold Individually, Shoulder Shortening, Round.
    Pare down the shoulder on shoulder screws. Slide these shims under the screw head to create the length you need. Use them to tighten the hold on bearings, pulleys, and sprockets, or shorten the length of travel along the shoulder.
    You can stack multiple shims to achieve the exact shoulder length or space you need.
    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
    For Screw
    Size
    ID
    ID
    Tolerance
    OD
    OD Tolerance
    Min.
    Hardness
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    For 1/8" Diameter Shoulder
    0.016"-0.002" to 0.002"No. 4
    		1/8"0" to 0.012"1/4"-0.005" to 0.002"Rockwell B701000000000000000
     
    For 3/16" Diameter Shoulder
    0.016"-0.002" to 0.002"No. 8
    		3/16"0" to 0.012"5/16"-0.005" to 0.002"Rockwell B70100000000000000
     
    For 1/4" Diameter Shoulder
    0.016"-0.002" to 0.002"No. 10
    		1/4"0" to 0.012"3/8"-0.005" to 0.002"Rockwell B705000000000000000
     
    For 5/16" Diameter Shoulder
    0.016"-0.002" to 0.002"1/4"
    		5/16"0" to 0.012"7/16"-0.005" to 0.002"Rockwell B70250000000000000
     
    For 3/8" Diameter Shoulder
    0.016"-0.002" to 0.002"5/16"
    		3/8"0" to 0.012"9/16"-0.005" to 0.002"Rockwell B702500000000000000
     
    For 1/2" Diameter Shoulder
    0.016"-0.002" to 0.002"3/8"
    		1/2"0" to 0.012"3/4"-0.005" to 0.002"Rockwell B702500000000000000
     
    For 5/8" Diameter Shoulder
    0.016"-0.002" to 0.002"1/2"
    		5/8"0" to 0.012"7/8"-0.005" to 0.002"Rockwell B702500000000000000
     
    For 3/4" Diameter Shoulder
    0.016"-0.002" to 0.002"5/8"
    		3/4"0" to 0.012"1"-0.005" to 0.002"Rockwell B701000000000000000
     

    Shim Stock

    Image of Product. Front orientation. Shim Stock. Sold Individually.
    Cut into custom shapes to create shims that suit your needs. With thickness tolerances as fine as a strand of hair, the shims will precisely align, space, and level components on dies, presses, 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.
    Stress-Resistant Spring Steel—Harder and holds its shape better than carbon steel. Use it for high-stress applications, such as leveling heavy machinery. It's best for dry areas since moisture will cause it to rust.
    Bronze—The choice for marine environments, it won't rust or deteriorate from exposure to salt water. It offers better corrosion resistance than 316 stainless steel but isn't as strong.
    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
    Temper
    Rating
    Type
    Form
    Specs. Met
    Form
    Each
    Stress-Resistant Spring Steel
     
    6" Wide × 25" Long
    0.016"-0.001" to 0.001"Full HardMaterial Certificate
    		Paper
    		ASTM A684, SAE AMS5122Sheet00000000000000
     
    6" Wide × 50" Long
    0.016"-0.001" to 0.001"Full HardMaterial Certificate
    		Paper
    		ASTM A682, ASTM A684, MIL-S-7947Roll000000000000
     
    8" Wide × 12" Long
    0.016"-0.001" to 0.001"Full HardMaterial Certificate
    		Paper
    		ASTM A684, SAE AMS5122Sheet0000000000000
     
    Bronze
     
    6" Wide × 25" Long
    0.016"-0.001" to 0.001"SpringMaterial Certificate
    		Paper
    		ASTM B103, SAE AMS4510Sheet0000000000000
     
    6" Wide × 50" Long
    0.016"-0.001" to 0.001"SpringMaterial Certificate
    		Paper
    		ASTM B103Roll000000000000
     

    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
    0.016"-0.0008" to 0.0008"80.002"Rockwell B80Material Certificate
    		ASTM A24016000000000000000040000000000000000900000000000000004000000000000000010000000000000000
     
    Carbon Steel
    0.016"-0.0008" to 0.0008"80.002"Rockwell B54Material Certificate
    		Fed. Spec. QQ-S-6981600000000000000400000000000000900000000000000040000000000000001000000000000000
     
    Aluminum
    0.016"-0.0008" to 0.0008"80.002"Not RatedMaterial Certificate
    		ASTM B209, SAE AMS-DTL-224991600000000000000400000000000000900000000000000040000000000000001000000000000000
     
    Brass
    0.016"-0.0008" to 0.0008"80.002"Not RatedMaterial Certificate
    		ASTM B36160000000000000004000000000000000900000000000000040000000000000001000000000000000
     

    Wave Spring Lock Washers

    Image of Product. Front orientation. Lock Washers. Wave Washer, Spring Lock Washer.
    The wavy shape flexes like a spring to keep nuts and screws secure on slightly uneven surfaces. These washers add a small amount of tension to stop fasteners from backing out due to mild vibration. While they don't hold as well as other lock washers, they do grip slightly better than curved washers. They work best in electrical panels, light fixtures, and other light duty assemblies. Since these washers hold their shape when untightened, you can reuse them a handful of times without losing strength.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these washers won't rust when exposed to moisture. However, they can't hold up to the harsh chemicals that 316 stainless steel can.
    3 Wave—More points of contact than single-wave washers for a better grip.
    For Screw
    Size
    No. of
    Waves
    ID
    OD
    Thk.
    Overall
    Ht.
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    1 1/2"
    		31.560"2.380"0.016"0.100"100000000000000
     

    Insulating Sleeve Washers

    Cover screw threads to stop electrical current in its tracks and prevent short circuits. These washers create a barrier between the screw threads and the mating surface when mounted in through holes. This barrier also extends the life of your assembly by preventing galvanic corrosion, which is when two different metals rust more quickly due to contact with each other.
    Flat Edge
    Image of Product. Front orientation. Insulating Washers. Insulating Sleeve Washers, Flat Edge.
    The flat edge distributes weight evenly to take pressure off screw heads.
    Nylon—Our most versatile insulating washers, these block unwanted current in everything from switches and circuit breakers to control panels and electric motors.
    Sleeve
    Temp.
    Range, ° F
    For Screw
    Size
    Ht.
    OD
    ID
    OD
    Thk.
    Overall
    Ht.
    Min.
    Max.
    Color
    Pkg.
    Qty.
    Pkg.
    Nylon
    1/4"
    		0.078"0.312"0.255"0.464"0.016"0.094"-40180Off-White100000000000000000
     
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