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    130 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.
    Ultra-Chemical-Resistant PTFE—The most chemical-resistant shims we offer, these stand up to the widest range of harsh acids, bases, solvents, and corrosive cleaners, even at temperatures up to 500° F. They also won't mar delicate surfaces.
    Color-Coded Plastic—These shims are color coded by thickness to quickly spot and grab the right size every time. Softer than metal, they won't mar delicate surfaces and they will never rust.
    Thk.
    Thk. Tolerance
    ID
    Tolerance
    OD Tolerance
    Min.
    Hardness
    Color
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1/8" ID × 3/16" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A2405000000000000000
     
    3/16" ID × 1/4" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240500000000000000
     
    1/4" ID × 3/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240100000000000000
     
    5/16" ID × 1/2" OD
    0.03"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240100000000000000
     
    11/32" ID × 13/16" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240100000000000000
     
    3/8" ID × 5/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240100000000000000
     
    1/2" ID × 3/4" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240100000000000000
     
    5/8" ID × 1" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A2401000000000000000
     
    3/4" ID × 1 1/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A2401000000000000000
     
    7/8" ID × 1 3/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A2401000000000000000
     
    1" ID × 1 1/2" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240500000000000000
     
    1 1/8" ID × 1 5/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240500000000000000
     
    1 1/4" ID × 1 3/4" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240500000000000000
     
    1 3/8" ID × 1 7/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240500000000000000
     
    1 1/2" ID × 2 1/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240500000000000000
     
    1 3/4" ID × 2 3/4" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A24010000000000000
     
    2" ID × 2 3/4" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A24010000000000000
     
    Highly Corrosion-Resistant 316 Stainless Steel
     
    1/8" ID × 3/16" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240500000000000000
     
    3/16" ID × 1/4" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240500000000000000
     
    1/4" ID × 3/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240100000000000000
     
    5/16" ID × 19/32" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240100000000000000
     
    11/32" ID × 13/16" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240100000000000000
     
    3/8" ID × 5/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240100000000000000
     
    1/2" ID × 3/4" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240100000000000000
     
    5/8" ID × 1" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A2401000000000000000
     
    3/4" ID × 1 1/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A2401000000000000000
     
    7/8" ID × 1 3/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A2401000000000000000
     
    1" ID × 1 1/2" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A240500000000000000
     
    1 1/8" ID × 1 5/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A2401000000000000000
     
    1 1/4" ID × 1 3/4" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A24050000000000000
     
    1 3/8" ID × 1 7/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A24050000000000000
     
    1 1/2" ID × 2 1/8" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A24050000000000000
     
    1 3/4" ID × 2 3/4" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A24050000000000000
     
    2" ID × 2 3/4" OD
    0.03"-0.003" to 0.003"0" to 0.011"-0.002" to 0.002"Rockwell B70—ASTM A24050000000000000
     
    Ultra-Chemical-Resistant PTFE
     
    1/4" ID × 3/8" OD
    0.03"-0.003" to 0.003"0" to 0.015"-0.01" to 0.01"—White—100000000000000
     
    3/8" ID × 5/8" OD
    0.03"-0.003" to 0.003"0" to 0.015"0" to 0.015"—White—100000000000000
     
    1/2" ID × 3/4" OD
    0.03"-0.003" to 0.003"0" to 0.015"-0.01" to 0.01"—White—100000000000000
     
    5/8" ID × 1" OD
    0.03"-0.003" to 0.003"0" to 0.015"0" to 0.015"—White—1000000000000000
     
    3/4" ID × 1 1/8" OD
    0.03"-0.003" to 0.003"0" to 0.015"-0.01" to 0.01"—White—1000000000000000
     
    1" ID × 1 1/2" OD
    0.03"-0.003" to 0.003"0" to 0.015"-0.01" to 0.01"—White—500000000000000
     
    Color-Coded Plastic
     
    3/8" ID × 5/8" OD
    0.03"-0.0015" to 0.0015"0" to 0.015"-0.005" to 0.005"—Coral—1000000000000000
     
    1/2" ID × 3/4" OD
    0.03"-0.0015" to 0.0015"0" to 0.015"-0.005" to 0.005"—Coral—1000000000000000
     
    5/8" ID × 1" OD
    0.03"-0.0015" to 0.0015"0" to 0.015"-0.005" to 0.005"—Coral—1000000000000000
     
    3/4" ID × 1 1/8" OD
    0.03"-0.0015" to 0.0015"0" to 0.015"-0.005" to 0.005"—Coral—1000000000000000
     
    1" ID × 1 1/2" OD
    0.03"-0.0015" to 0.0015"0" to 0.015"-0.005" to 0.005"—Coral—1000000000000000
     
    1 1/4" ID × 1 3/4" OD
    0.03"-0.0015" to 0.0015"0" to 0.015"-0.005" to 0.005"—Coral—1000000000000000
     
    1 1/2" ID × 2 1/8" OD
    0.03"-0.0015" to 0.0015"0" to 0.015"-0.005" to 0.005"—Coral—1000000000000000
     
    1 3/4" ID × 2 3/4" OD
    0.03"-0.0015" to 0.0015"0" to 0.015"-0.005" to 0.005"—Coral—1000000000000000
     
    2" ID × 2 3/4" OD
    0.03"-0.0015" to 0.0015"0" to 0.015"-0.005" to 0.005"—Coral—1000000000000000
     

    Slotted Shims

    Image of ProductInUse. Front orientation. Shims. Precision Adjust, Slot, Sold Individually.
    Image of Product. Front orientation. Shims. Precision Adjust, Slot, Sold Individually, Tab End.
    Image of Product. Front orientation. Shims. Precision Adjust, Slot, Sold Individually, Square End.

    Tab End

    Square End

    Slip these shims around existing mounting fasteners to precisely align and level components such as pumps, compressors, and gearboxes with motors, all without disassembling them. They’re also good for leveling machines on uneven surfaces. To reduce sizing errors, these shims are either labeled with their thickness so there's no need to measure or color coded by thickness to quickly spot the right size.
    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.
    Painted 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.
    Plastic—Softer than metal, these shims won't mar delicate surfaces and they will never rust.
    Insertion Tools—Ease shim insertion and removal, keeping your fingers clear in the process.
    Shims
    Insertion Tools
    Slot
    Each
    Package
    Thk.
    Thk. Tolerance
    For Max.
    Screw Size
    Wd.
    Dp.
    Min.
    Hardness
    Identification
    Type
    Color
    End
    Shape
    Each
    Pkg.
    Qty.
    Pkg.
    Each
    18-8 Stainless Steel
     
    1" Lg. × 1" Wd. (Shim Trade Size AAA)
    0.03"-0.002" to 0.002"1/4"
    		5/16"5/8"Rockwell C42Labeled—Tab0000000000000020000000000000000000000000000
     
    1 1/2" Lg. × 1 1/2" Wd. (Shim Trade Size AA)
    0.03"-0.0015" to 0.0015"3/8"
    		7/16"61/64"Rockwell B85Labeled—Tab0000000000000200000000000000000000000000
     
    2" Lg. × 2" Wd. (Shim Trade Size A)
    0.03"-0.0015" to 0.0015"1/2"
    		9/16"1 9/32"Rockwell B85Labeled—Tab0000000000002000000000000000000000000000
     
    2 1/2" Lg. × 2 1/2" Wd. (Shim Trade Size BB)
    0.03"-0.0015" to 0.0015"5/8"
    		11/16"1 19/32"Rockwell B85Labeled—Tab00000000000020000000000000000000000000000
     
    3" Lg. × 3" Wd. (Shim Trade Size B)
    0.03"-0.0015" to 0.0015"3/4"
    		13/16"1 29/32"Rockwell B85Labeled—Tab000000000000200000000000000000000000000
     
    4" Lg. × 4" Wd. (Shim Trade Size C)
    0.03"-0.0015" to 0.0015"1 1/8"
    		1 3/16"2 19/32"Rockwell B85Labeled—Tab000000000000200000000000000000000000000
     
    5" Lg. × 5" Wd. (Shim Trade Size D)
    0.03"-0.0015" to 0.0015"1 1/2"
    		1 9/16"3 9/32"Rockwell B85Labeled—Tab0000000000002000000000000000000000000000
     
    6" Lg. × 5" Wd. (Shim Trade Size DD)
    0.03"-0.0015" to 0.0015"1 1/2"
    		1 9/16"4 1/2"Rockwell C42Labeled—Tab000000000000020000000000000000———0
     
    6" Lg. × 6" Wd. (Shim Trade Size E)
    0.03"-0.0015" to 0.0015"1 7/8"
    		1 15/16"4"Rockwell B85Labeled—Tab000000000000020000000000000000000000000000
     
    6" Lg. × 6" Wd. (Shim Trade Size G)
    0.03"-0.0015" to 0.0015"2 1/4"
    		2 5/16"4 3/16"Rockwell B85Labeled—Tab000000000000020000000000000000000000000000
     
    8" Lg. × 8" Wd. (Shim Trade Size H)
    0.03"-0.0015" to 0.0015"2 1/4"
    		2 5/16"5 3/16"Rockwell B85Labeled—Tab00000000000000200000000000000000000000000000
     
    Painted Aluminum
     
    1 1/2" Lg. × 1 1/2" Wd. (Shim Trade Size AA)
    0.03"-0.003" to 0.003"5/16"
    		3/8"15/16"Not RatedColor CodedCoralSquare———0200000000000000———0
     
    2" Lg. × 2" Wd. (Shim Trade Size A)
    0.03"-0.003" to 0.003"3/8"
    		7/16"1 7/32"Not RatedColor CodedCoralSquare———020000000000000———0
     
    3" Lg. × 3" Wd. (Shim Trade Size B)
    0.03"-0.003" to 0.003"1/2"
    		9/16"1 25/32"Not RatedColor CodedCoralSquare———010000000000000———0
     
    4" Lg. × 4" Wd. (Shim Trade Size C)
    0.03"-0.003" to 0.003"7/8"
    		1"2 1/2"Not RatedColor CodedCoralSquare———05000000000000———0
     
    Plastic
     
    1 1/2" Lg. × 1 1/2" Wd. (Shim Trade Size AA)
    0.03"-0.003" to 0.003"5/16"
    		3/8"15/16"—Color CodedCoralSquare———0200000000000000———0
     
    2" Lg. × 2" Wd. (Shim Trade Size A)
    0.03"-0.003" to 0.003"3/8"
    		7/16"1 7/32"—Color CodedCoralSquare———020000000000000———0
     
    3" Lg. × 3" Wd. (Shim Trade Size B)
    0.03"-0.003" to 0.003"1/2"
    		9/16"1 25/32"—Color CodedCoralSquare———010000000000000———0
     
    4" Lg. × 4" Wd. (Shim Trade Size C)
    0.03"-0.003" to 0.003"7/8"
    		1"2 1/2"—Color CodedCoralSquare———05000000000000———0
     

    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.
    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.
    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.
    Painted 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.
    Ultra-Chemical-Resistant PTFE—The most chemical-resistant shim stock we offer, it stands up to the widest range of harsh acids, bases, solvents, and corrosive cleaners, even at temperatures up to 500° F. It also won't mar delicate surfaces.
    Plastic—Softer than metal, it won't mar delicate surfaces and it will never rust.
    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
    Color
    Type
    Form
    Specs. Met
    Form
    Each
    18-8 Stainless Steel
     
    8" Wide × 12" Long
    0.03"-0.001" to 0.003"Full Hard—Material Certificate
    		Paper
    		ASTM A666Sheet00000000000000
     
    Stress-Resistant Spring Steel
     
    6" Wide × 12" Long
    0.03"-0.0015" to 0.0015"Full Hard—Material Certificate
    		Paper
    		ASTM A684, SAE AMS5122Sheet0000000000000
     
    6" Wide × 25" Long
    0.03"-0.0015" to 0.0015"Full Hard—Material Certificate
    		Paper
    		ASTM A684, SAE AMS5122Sheet000000000000
     
    6" Wide × 50" Long
    0.03"-0.0015" to 0.0015"Full Hard—Material Certificate
    		Paper
    		ASTM A682, ASTM A684, MIL-S-7947Roll000000000000
     
    8" Wide × 12" Long
    0.03"-0.0015" to 0.0015"Full Hard—Material Certificate
    		Paper
    		ASTM A684, SAE AMS5122Sheet0000000000000
     
    Painted Aluminum
     
    6" Wide × 24" Long
    0.03"-0.003" to 0.003"1/2 Hard to Full HardCoralMaterial Certificate
    		Paper
    		—Sheet0000000000000
     
    12" Wide × 24" Long
    0.03"-0.003" to 0.003"1/2 Hard to Full HardCoralMaterial Certificate
    		Paper
    		—Sheet000000000000
     
    Ultra-Chemical-Resistant PTFE
     
    6" Wide × 50" Long
    0.03"-0.003" to 0.003"—White——ASTM D3308, MIL-P-22241Roll0000000000000
     
    8" Wide × 12" Long
    0.03"-0.003" to 0.003"—White——ASTM D3308, MIL-P-22241Sheet000000000000
     
    12" Wide × 24" Long
    0.03"-0.003" to 0.003"—White——ASTM D3308, MIL-P-22241Roll00000000000
     
    20" Wide × 50" Long
    0.03"-0.003" to 0.003"—White——ASTM D3308, MIL-P-22241Roll0000000000000
     
    Plastic
     
    5" Wide × 20" Long
    0.03"-0.003" to 0.003"—Coral———Sheet00000000000
     
    10" Wide × 20" Long
    0.03"-0.003" to 0.003"—Coral———Sheet000000000000
     
    12" Wide × 24" Long
    0.03"-0.003" to 0.003"—Coral———Sheet0000000000000
     
    20" Wide × 20" Long
    0.03"-0.003" to 0.003"—Coral———Sheet000000000000
     
    20" Wide × 50" Long
    0.03"-0.003" to 0.003"—Coral———Sheet0000000000000
    0.03"-0.003" to 0.003"—Coral———Roll000000000000
     

    Shims for Shortening Screw Shoulders

    Image of ProductInUse. Front orientation. Contains Annotated. Shims. Round, Shoulder Shortening, Sold Individually.
    Image of Product. Front orientation. Shims. Round, Shoulder Shortening, Sold Individually.
    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.
    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 1/8" Diameter Shoulder
    0.03"-0.003" to 0.003"No. 4
    		1/8"0" to 0.012"1/4"-0.005" to 0.002"Rockwell B701000000000000000
     
    For 3/16" Diameter Shoulder
    0.03"-0.003" to 0.003"No. 8
    		3/16"0" to 0.012"5/16"-0.005" to 0.002"Rockwell B70100000000000000
     
    For 1/4" Diameter Shoulder
    0.03"-0.003" to 0.003"No. 10
    		1/4"0" to 0.012"3/8"-0.005" to 0.002"Rockwell B705000000000000000
     
    For 5/16" Diameter Shoulder
    0.03"-0.003" to 0.003"1/4"
    		5/16"0" to 0.012"7/16"-0.005" to 0.002"Rockwell B7010000000000000000
     
    For 3/8" Diameter Shoulder
    0.03"-0.003" to 0.003"5/16"
    		3/8"0" to 0.012"9/16"-0.005" to 0.002"Rockwell B705000000000000000
     
    For 1/2" Diameter Shoulder
    0.03"-0.003" to 0.003"3/8"
    		1/2"0" to 0.012"3/4"-0.005" to 0.002"Rockwell B705000000000000000
     
    For 5/8" Diameter Shoulder
    0.03"-0.003" to 0.003"1/2"
    		5/8"0" to 0.012"7/8"-0.005" to 0.002"Rockwell B702500000000000000
     
    For 3/4" Diameter Shoulder
    0.03"-0.003" to 0.003"5/8"
    		3/4"0" to 0.012"1"-0.005" to 0.002"Rockwell B701000000000000000
     
    For 1" Diameter Shoulder
    0.03"-0.003" to 0.003"7/8"
    		1"0" to 0.012"1 1/4"-0.005" to 0.002"Rockwell B701000000000000000
     
    Highly Corrosion-Resistant 316 Stainless Steel
     
    For 1/8" Diameter Shoulder
    0.03"-0.003" to 0.003"No. 4
    		1/8"0" to 0.012"1/4"-0.005" to 0.002"Rockwell B70100000000000000
     
    For 3/16" Diameter Shoulder
    0.03"-0.003" to 0.003"No. 8
    		3/16"0" to 0.012"5/16"-0.005" to 0.002"Rockwell B701000000000000000
     
    For 1/4" Diameter Shoulder
    0.03"-0.003" to 0.003"No. 10
    		1/4"0" to 0.012"3/8"-0.005" to 0.002"Rockwell B701000000000000000
     
    For 5/16" Diameter Shoulder
    0.03"-0.003" to 0.003"1/4"
    		5/16"0" to 0.012"7/16"-0.005" to 0.002"Rockwell B701000000000000000
     
    For 3/8" Diameter Shoulder
    0.03"-0.003" to 0.003"5/16"
    		3/8"0" to 0.012"9/16"-0.005" to 0.002"Rockwell B701000000000000000
     
    For 1/2" Diameter Shoulder
    0.03"-0.003" to 0.003"3/8"
    		1/2"0" to 0.012"3/4"-0.005" to 0.002"Rockwell B701000000000000000
     

    Shims for Lengthening Screw Shoulders

    Image of ProductInUse. Front orientation. Contains Annotated. Shims. Sold Individually, Round, Shoulder Lengthening.
    Image of Product. Front orientation. Shims. Sold Individually, Round, 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
    0.03"-0.003" to 0.003"No. 10
    		0.171"0" to 0.011"0.241"-0.002" to 0.002"Rockwell B702500000000000000
     
    For 5/16" Diameter Shoulder
    0.03"-0.003" to 0.003"1/4"
    		0.234"0" to 0.011"0.303"-0.002" to 0.002"Rockwell B70250000000000000
     
    For 3/8" Diameter Shoulder
    0.03"-0.003" to 0.003"5/16"
    		0.289"0" to 0.011"0.365"-0.002" to 0.002"Rockwell B702500000000000000
     
    For 1/2" Diameter Shoulder
    0.03"-0.003" to 0.003"3/8"
    		0.352"0" to 0.011"0.491"-0.002" to 0.002"Rockwell B702500000000000000
     
    For 5/8" Diameter Shoulder
    0.03"-0.003" to 0.003"1/2"
    		0.473"0" to 0.011"0.616"-0.002" to 0.002"Rockwell B70100000000000000
     
    Highly Corrosion-Resistant 316 Stainless Steel
     
    For 1/4" Diameter Shoulder
    0.03"-0.003" to 0.003"No. 10
    		0.171"0" to 0.011"0.241"-0.002" to 0.002"Rockwell B701000000000000000
     
    For 5/16" Diameter Shoulder
    0.03"-0.003" to 0.003"1/4"
    		0.234"0" to 0.011"0.303"-0.002" to 0.002"Rockwell B701000000000000000
     
    For 3/8" Diameter Shoulder
    0.03"-0.003" to 0.003"5/16"
    		0.289"0" to 0.011"0.365"-0.002" to 0.002"Rockwell B701000000000000000
     
    For 1/2" Diameter Shoulder
    0.03"-0.003" to 0.003"3/8"
    		0.352"0" to 0.011"0.491"-0.002" to 0.002"Rockwell B701000000000000000
     

    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
    0.03"-0.003" to 0.003"1"0" to 0.011"1 1/2"-0.002" to 0.002"1/4"3/32"Rockwell B8010000000000000000
     
    For 1 1/4" Diameter Shafts
    0.03"-0.003" to 0.003"1 1/4"0" to 0.011"1 3/4"-0.002" to 0.002"5/16"1/8"Rockwell B8050000000000000
     
    For 1 1/2" Diameter Shafts
    0.03"-0.003" to 0.003"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
    0.03"-0.003" to 0.003"2"0" to 0.011"2 3/4"-0.002" to 0.002"1/2"3/16"Rockwell B80500000000000000
     
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