B Shims | McMaster-Carr

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74 Products

Slotted Shims

Image of ProductInUse. Front orientation. Shims. Precision Adjust, Slot, Sold Individually.


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.

Super-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.

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
	Thk.	Thk. Tolerance	For Max. Screw Size	Wd.	Dp.	Min. Hardness	Identification Type	Color	End Shape	Pkg. Qty.		Pkg.		Each
18-8 Stainless Steel





				3" Lg. × 3" Wd. (Shim Trade Size B)
				0.001"	-0.00005" to 0.00005"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	00000	00000000	00000
				0.002"	-0.0001" to 0.0001"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.003"	-0.00015" to 0.00015"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.004"	-0.0002" to 0.0002"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.005"	-0.00025" to 0.00025"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.008"	-0.0004" to 0.0004"	3/4"	13/16"	1 29/32"	Rockwell C42	Labeled	—	Tab	1	00000000	0000	00000000	0000
				0.01"	-0.0005" to 0.0005"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.012"	-0.0006" to 0.0006"	3/4"	13/16"	1 29/32"	Rockwell C42	Labeled	—	Tab	1	00000000	0000	00000000	0000
				0.015"	-0.00075" to 0.00075"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.02"	-0.001" to 0.001"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.025"	-0.00125" to 0.00125"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.03"	-0.0015" to 0.0015"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	00000000	0000	00000000	0000
				0.04"	-0.003" to 0.003"	3/4"	13/16"	1 29/32"	Rockwell B70	Labeled	—	Tab	1	00000000	0000	00000000	0000
				0.05"	-0.002" to 0.002"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.06"	-0.003" to 0.003"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	00000000	0000	00000000	0000
				0.075"	-0.002" to 0.002"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.1"	-0.004" to 0.004"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.125"	-0.004" to 0.004"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	0000000	0000	00000000	0000
				0.187"	-0.01" to 0.01"	3/4"	13/16"	1 29/32"	Rockwell B70	Labeled	—	Tab	1	00000000	00000	00000000	0000
				0.25"	-0.01" to 0.01"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	00000000	00000	00000000	0000
				0.375"	-0.01" to 0.01"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	00000000	00000	00000000	0000
				0.5"	-0.015" to 0.015"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	—	Tab	1	00000000	00000	00000000	0000
				0.75"	-0.06" to 0.06"	3/4"	13/16"	1 29/32"	Rockwell B70	Labeled	—	Tab	1	00000000	000000	00000000	0000
				1"	-0.07" to 0.07"	3/4"	13/16"	1 29/32"	Rockwell B70	Labeled	—	Tab	1	00000000	000000	00000000	0000



						75 mm Lg. × 75 mm Wd. (Shim Trade Size B)
						0.025 mm	-0.0025 mm to 0.0025 mm	M22	22.3 mm	38.1 mm	Rockwell C40	Labeled	—	Tab	1	00000000	0000	00000000	0000
						0.05 mm	-0.0035 mm to 0.0035 mm	M22	22.3 mm	38.1 mm	Rockwell C40	Labeled	—	Tab	1	00000000	0000	00000000	0000
						0.1 mm	-0.007 mm to 0.007 mm	M22	22.3 mm	38.1 mm	Rockwell C40	Labeled	—	Tab	1	00000000	0000	00000000	0000
						0.2 mm	-0.015 mm to 0.015 mm	M22	22.3 mm	38.1 mm	Rockwell C40	Labeled	—	Tab	1	00000000	0000	00000000	0000
						0.25 mm	-0.02 mm to 0.02 mm	M22	22.3 mm	38.1 mm	Rockwell C40	Labeled	—	Tab	1	00000000	0000	00000000	0000
						0.4 mm	-0.032 mm to 0.032 mm	M22	22.3 mm	38.1 mm	Rockwell C40	Labeled	—	Tab	1	00000000	0000	00000000	0000
						0.5 mm	-0.032 mm to 0.032 mm	M22	22.3 mm	38.1 mm	Rockwell C40	Labeled	—	Tab	1	00000000	0000	00000000	0000
						0.7 mm	-0.032 mm to 0.032 mm	M22	22.3 mm	38.1 mm	Rockwell B70	Labeled	—	Tab	1	00000000	0000	00000000	0000
						1 mm	-0.05 mm to 0.05 mm	M22	22.3 mm	38.1 mm	Not Rated	Labeled	—	Tab	1	00000000	0000	00000000	0000
						2 mm	-0.07 mm to 0.07 mm	M22	22.3 mm	38.1 mm	Not Rated	Labeled	—	Tab	1	00000000	00000	00000000	0000

						Super-Corrosion-Resistant 316 Stainless Steel





										3" Lg. × 3" Wd. (Shim Trade Size B)
										0.005"	-0.0001" to 0.0001"	3/4"	7/8"	2 1/8"	Rockwell C36	Labeled	—	Tab	1	000000000	0000	000000000	0000
										0.01"	-0.0005" to 0.0005"	3/4"	7/8"	2 1/8"	Rockwell C36	Labeled	—	Tab	1	000000000	0000	000000000	0000
										0.015"	-0.0005" to 0.0005"	3/4"	7/8"	2 1/8"	Rockwell C36	Labeled	—	Tab	1	000000000	0000	000000000	0000
										0.02"	-0.00025" to 0.00025"	3/4"	7/8"	2 1/8"	Rockwell C36	Labeled	—	Tab	1	000000000	0000	000000000	0000
										0.025"	-0.0008" to 0.0008"	3/4"	7/8"	2 1/8"	Rockwell C36	Labeled	—	Tab	1	000000000	0000	000000000	0000
										0.05"	-0.002" to 0.002"	3/4"	7/8"	2 1/8"	Rockwell C36	Labeled	—	Tab	1	000000000	0000	000000000	0000
										0.125"	-0.003" to 0.003"	3/4"	7/8"	2 1/8"	Rockwell C36	Labeled	—	Tab	1	000000000	0000	000000000	0000

										Painted Aluminum





												3" Lg. × 3" Wd. (Shim Trade Size B)
		0.002"										-0.0002" to 0.0002"	1/2"	9/16"	1 25/32"	Not Rated	Color Coded	Red	Square	20	0000000	0000	———	0
		0.003"	-0.0003" to 0.0003"									1/2"	9/16"	1 25/32"	Not Rated	Color Coded	Green	Square	20	0000000	0000	———	0
		0.005"	-0.0005" to 0.0005"									1/2"	9/16"	1 25/32"	Not Rated	Color Coded	Blue	Square	20	0000000	0000	———	0
		0.01"	-0.001" to 0.001"									1/2"	9/16"	1 25/32"	Not Rated	Color Coded	Brown	Square	10	0000000	00000	———	0
		0.015"	-0.0015" to 0.0015"									1/2"	9/16"	1 25/32"	Not Rated	Color Coded	Pink	Square	10	0000000	00000	———	0
		0.02"	-0.002" to 0.002"									1/2"	9/16"	1 25/32"	Not Rated	Color Coded	Yellow	Square	10	0000000	00000	———	0
		0.025"	-0.0025" to 0.0025"									1/2"	9/16"	1 25/32"	Not Rated	Color Coded	White	Square	10	0000000	00000	———	0
		0.03"	-0.003" to 0.003"									1/2"	9/16"	1 25/32"	Not Rated	Color Coded	Coral	Square	10	0000000	00000	———	0
		0.06"	-0.006" to 0.006"									1/2"	9/16"	1 25/32"	Not Rated	Color Coded	Gray	Square	10	0000000	00000	———	0

		Plastic





														3" Lg. × 3" Wd. (Shim Trade Size B)
														0.005"	-0.0002" to 0.0002"	1/2"	9/16"	1 25/32"	—	Color Coded	Blue	Square	20	0000000	0000	———	0
														0.01"	-0.0005" to 0.0005"	1/2"	9/16"	1 25/32"	—	Color Coded	Brown	Square	20	0000000	00000	———	0
														0.015"	-0.0015" to 0.0015"	1/2"	9/16"	1 25/32"	—	Color Coded	Pink	Square	10	0000000	00000	———	0
														0.02"	-0.002" to 0.002"	1/2"	9/16"	1 25/32"	—	Color Coded	Yellow	Square	10	0000000	00000	———	0
														0.025"	-0.0025" to 0.0025"	1/2"	9/16"	1 25/32"	—	Color Coded	White	Square	10	0000000	00000	———	0
														0.03"	-0.003" to 0.003"	1/2"	9/16"	1 25/32"	—	Color Coded	Coral	Square	10	0000000	00000	———	0
														0.06"	-0.006" to 0.006"	1/2"	9/16"	1 25/32"	—	Color Coded	Clear	Square	5	0000000	00000	———	0

Slotted Shim Assortments

When you don’t know the exact shim thickness you’ll need, keep multiple slotted shim thicknesses on hand so you always have the right one. 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.

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.

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
	No. of Pieces	Thicknesses Included	For Max. Screw Size	Wd.	Dp.	Min. Hardness	Identification Type	End Shape		Each		Each
18-8 Stainless Steel





				3" Lg. × 3" Wd. (Shim Trade Size B)
				13	0.001", 0.002", 0.003", 0.004", 0.005", 0.010", 0.015", 0.020", 0.025", 0.050", 0.075", 0.100", 0.125"	3/4"	13/16"	1 29/32"	Rockwell B70	Labeled	Tab	000000000	000000	00000000	00000
				26	0.001", 0.002", 0.003", 0.004", 0.005", 0.010", 0.015", 0.020", 0.025", 0.050", 0.075", 0.100", 0.125"	3/4"	13/16"	1 29/32"	Rockwell B70	Labeled	Tab	000000000	00000	00000000	0000
				65	0.001", 0.002", 0.003", 0.004", 0.005", 0.010", 0.015", 0.020", 0.025", 0.050", 0.075", 0.125"	3/4"	13/16"	1 29/32"	Rockwell B70	Labeled	Tab	000000000	000000	00000000	0000



						75 mm Lg. × 75 mm Wd. (Shim Trade Size B)
						10	0.025 mm, 0.050 mm, 0.100 mm, 0.200 mm, 0.250 mm, 0.400 mm, 0.500 mm, 0.700 mm, 1.000 mm, 2.000 mm	M22	22.33 mm	38.1 mm	Not Rated	Labeled	Tab	00000000	00000	00000000	0000
						20	0.025 mm, 0.050 mm, 0.100 mm, 0.20 mm, 0.250 mm, 0.400 mm, 0.500 mm, 0.700 mm, 1.000 mm, 2.000 mm	M15	15.88 mm	25.4 mm	Not Rated	Labeled	Tab	00000000	00000	00000000	0000
						100	0.025 mm, 0.050 mm, 0.100 mm, 0.200 mm, 0.250 mm, 0.400 mm, 0.500 mm, 0.700 mm, 1.000 mm, 2.000 mm	M22	22.33 mm	38.1 mm	Not Rated	Labeled	Tab	00000000	000000	00000000	0000
						200	0.025 mm, 0.050 mm, 0.100 mm, 0.200 mm, 0.250 mm, 0.400 mm, 0.500 mm, 0.700 mm, 1.000 mm, 2.000 mm	M15	15.88 mm	25.4 mm	Not Rated	Labeled	Tab	00000000	000000	00000000	0000

						Painted Aluminum





										3" Lg. × 3" Wd. (Shim Trade Size B)
										18	0.002", 0.003", 0.004", 0.005", 0.010", 0.015", 0.020", 0.030", 0.060”	1/2"	9/16"	1 25/32"	Brinell 32	Color Coded	Square	00000000	00000	———	0
										90	0.002", 0.003", 0.004", 0.005", 0.010", 0.015", 0.020", 0.030", 0.060”	1/2"	9/16"	1 25/32"	Brinell 32	Color Coded	Square	00000000	00000	———	0
										180	0.002”, 0.003”, 0.004”, 0.005”, 0.010”, 0.015”, 0.020”, 0.030”, 0.060”	1/2"	9/16"	1 25/32"	Brinell 32	Color Coded	Square	0000000	000000	———	0

										Plastic





														3" Lg. × 3" Wd. (Shim Trade Size B)
														18	0.002”, 0.003”, 0.004", 0.005”, 0.010”, 0.015”, 0.020”, 0.030”, 0.060”	1/2"	9/16"	1 25/32"	—	Color Coded	Square	00000000	00000	———	0
														90	0.002”, 0.003”, 0.004”, 0.005”, 0.010”, 0.015”, 0.020”, 0.030”, 0.060”	1/2"	9/16"	1 25/32"	—	Color Coded	Square	00000000	00000	———	0
														180	0.002”, 0.003”, 0.004”, 0.005”, 0.010”, 0.015”, 0.020”, 0.030”, 0.060”	1/2"	9/16"	1 25/32"	—	Color Coded	Square	0000000	000000	———	0

Shims with Metal Case

Protect the shims from damage with the rugged metal case. Dividers sort the shims by thickness, while sturdy handles make it easy to carry them around.

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.

Insertion Tools—Ease shim insertion and removal, keeping your fingers clear in the process.

	Shims										Insertion Tools
				Slot
	No. of Pieces	Thicknesses Included	For Max. Screw Size	Wd.	Dp.	Min. Hardness	Identification Type	End Shape		Each		Each
18-8 Stainless Steel





				3" Lg. × 3" Wd. (Shim Trade Size B)
				130	0.001", 0.002", 0.003", 0.004", 0.005", 0.010", 0.015", 0.020", 0.025", 0.050", 0.075", 0.100", 0.125"	3/4"	13/16"	1 29/32"	Rockwell B70	Labeled	Tab	00000000	0000000	00000000	00000
				260	0.001", 0.002", 0.003", 0.004", 0.005", 0.010", 0.015", 0.020", 0.025", 0.050", 0.075", 0.100", 0.125"	3/4"	13/16"	1 29/32"	Rockwell B70	Labeled	Tab	000000000	000000	00000000	0000