Keyed Metals | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	ID ID

	OD OD

	Thickness Thickness

	Shape Shape	Show

	Keyed

	Shape Shape	Hide


Sheet and Bar	Rod and Disc

Round Tube	90° Angle

Rectangular Tube	U Channel

Hex Bar	Foil

T Bar	Ball

Wire	Z Bar

H Bar	I Beam

Half Round	Hat Channel

Triangular Bar	Ribbed Sheet

Honeycomb	Hex Tube

Hex Ingot	Rod

Ingot	Disc

Ring	Slotted

Made to Order	Keyed

	Keyed Shim Type Keyed Shim Type


With Notch	With Tab

	Material Material

Stainless Steel

Steel

	For Shaft Diameter For Shaft Diameter

	Magnetic Properties Magnetic Properties

Magnetic

May Be Mildly Magnetic

	Individual/Set Individual/Set

Individual

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Notch Width Notch Width

	Notch Depth Notch Depth

	Tab Width Tab Width

1/4"

3/8"

1/2"

	Tab Depth Tab Depth

3/32"

5/32"

3/16"

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79 Products

Shims for Keyed Shafts

Precisely shaped to fit snugly on keyed shafts, these shims align, level, and space components. Because of their tight fit, they also help components rotate in unison with the shaft.

Shims with a notch need the key inserted. They’re often referred to as arbor spacers.

Shims with a tab only fit without a key—the tab sits inside the keyway on the keyed shaft.

Stainless steel shims are more corrosion resistant than carbon steel shims. Use them in wet environments where rust is a concern.

Carbon steel shims are stronger than stainless steel shims, but shouldn’t be used in wet environments.

For technical drawings and 3-D models, click on a part number.

With Notch—18-8 Stainless Steel

Stainless Steel Shim with Notch

					Notch
For Shaft Dia.	ID	ID Tolerance	OD	OD Tolerance	Wd.	Dp.	Minimum Hardness	Magnetic Properties	Pkg. Qty.		Pkg.
0.001" Thick. (-0.0001" to 0.0001" Tolerance)
1/2"	1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	1/8"	3/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	000000
3/4"	3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
0.002" Thick. (-0.0002" to 0.0002" Tolerance)
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
0.003" Thick. (-0.0003" to 0.0003" Tolerance)
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	5	000000000	0000
0.004" Thick. (-0.0004" to 0.0004" Tolerance)
1/2"	1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	1/8"	3/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
3/4"	3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1"	1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1/4"	3/32"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.002" to 0.002"	3/8"	5/32"	Rockwell B80	May Be Mildly Magnetic	5	000000000	0000
2"	2"	0" to 0.011"	2 3/4"	-0.002" to 0.002"	1/2"	3/16"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
0.005" Thick. (-0.0005" to 0.0005" Tolerance)
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
0.006" Thick. (-0.0006" to 0.0006" Tolerance)
1/2"	1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	1/8"	3/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
3/4"	3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1"	1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1/4"	3/32"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.002" to 0.002"	3/8"	5/32"	Rockwell B80	May Be Mildly Magnetic	5	000000000	0000
2"	2"	0" to 0.011"	2 3/4"	-0.002" to 0.002"	1/2"	3/16"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
0.007" Thick. (-0.0007" to 0.0007" Tolerance)
3/4"	3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1"	1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1/4"	3/32"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	5	000000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.002" to 0.002"	3/8"	5/32"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.002" to 0.002"	1/2"	3/16"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
0.008" Thick. (-0.0008" to 0.0008" Tolerance)
3/4"	3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1"	1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1/4"	3/32"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	5	000000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.002" to 0.002"	3/8"	5/32"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.002" to 0.002"	1/2"	3/16"	Rockwell B80	May Be Mildly Magnetic	1	000000000	0000
0.01" Thick. (-0.001" to 0.001" Tolerance)
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	5	000000000	0000
0.012" Thick. (-0.002" to 0.002" Tolerance)
3/4"	3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1"	1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1/4"	3/32"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	5	000000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.002" to 0.002"	3/8"	5/32"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.002" to 0.002"	1/2"	3/16"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
0.015" Thick. (-0.002" to 0.002" Tolerance)
3/4"	3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1"	1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1/4"	3/32"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.002" to 0.002"	3/8"	5/32"	Rockwell B80	May Be Mildly Magnetic	5	000000000	0000
2"	2"	0" to 0.011"	2 3/4"	-0.002" to 0.002"	1/2"	3/16"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
0.02" Thick. (-0.0025" to 0.0025" Tolerance)
7/8"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
0.024" Thick. (-0.0025" to 0.0025" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1/4"	3/32"	Rockwell B80	May Be Mildly Magnetic	10	000000000	00000
1 1/4"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	May Be Mildly Magnetic	5	000000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.002" to 0.002"	3/8"	5/32"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.002" to 0.002"	1/2"	3/16"	Rockwell B80	May Be Mildly Magnetic	1	000000000	0000
0.048" Thick. (-0.0035" to 0.0035" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1/4"	3/32"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.002" to 0.002"	3/8"	5/32"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.002" to 0.002"	1/2"	3/16"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000
1/8" Thick. (-0.005" to 0.005" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1/4"	3/32"	Rockwell B80	May Be Mildly Magnetic	5	000000000	00000

With Tab—1008-1010 Carbon Steel

Carbon Steel Shim with Tab

					Tab
For Shaft Dia.	ID	ID Tolerance	OD	OD Tolerance	Wd.	Dp.	Minimum Hardness	Magnetic Properties	Pkg. Qty.		Pkg.
0.005" Thick. (-0.0005" to 0.0005" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	00000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	10	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
0.01" Thick. (-0.00075" to 0.00075" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	10	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
0.015" Thick. (-0.001" to 0.001" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	10	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
0.02" Thick. (-0.001" to 0.001" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	10	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
0.031" Thick. (-0.0015" to 0.0015" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	10	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
0.062" Thick. (-0.0025" to 0.0025" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	10	00000000	00000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	5	00000000	0000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	5	00000000	0000
1/8" Thick. (-0.003" to 0.003" Tolerance)
1"	1"	0" to 0.011"	1 1/2"	-0.005" to 0.005"	1/4"	3/32"	Rockwell B84	Magnetic	5	00000000	0000
1 1/2"	1 1/2"	0" to 0.011"	2 1/8"	-0.005" to 0.005"	3/8"	5/32"	Rockwell B84	Magnetic	5	00000000	00000
2"	2"	0" to 0.011"	2 3/4"	-0.005" to 0.005"	1/2"	3/16"	Rockwell B84	Magnetic	1	00000000	0000