0.124" Aluminum Sheets | McMaster-Carr

Cut this shim stock it into custom shapes to fit your application. Stock is made of layers of material bonded with adhesive; remove layers with a utility knife until you get the thickness you need. To make the layers easier to pull apart, gently heat the shim to soften the adhesive.

For accurate leveling, choose materials such as steel or stainless steel, which are hard enough to resist scratching and deforming. Softer shims, like copper or aluminum, can be used as wear plates between components that rub together, preventing damage to equipment.

18-8 stainless steel shim stock is more corrosion resistant than carbon steel shim stock.

Carbon steel shim stock has excellent strength and can be welded, but isn't as corrosion resistant as other shim stock.

Brass shim stock is corrosion resistant and nonmagnetic.

Polyimide plastic shim stock is corrosion resistant, electrically insulating, and holds its shape at extreme temperatures. It's easier to peel apart than metal shim stock. Stock includes a material certificate with traceable lot number and test report.

18-8 Stainless Steel

12" × 12"
Thick.	Thick. Tolerance	No. of Layers	Min. Hardness	Temper Rating	Specifications Met	Magnetic Properties		Each
0.002" Layer Thick. (-0.0002" to 0.0002" Tolerance)
0.124"	-0.003" to 0.012"	56	Not Rated	Softened (Annealed)	SAE AMS-DTL-22499	May Be Mildly Magnetic	0000000	0000000
20" × 24"
0.002" Layer Thick. (-0.0002" to 0.0002" Tolerance)
0.124"	-0.003" to 0.012"	56	Not Rated	Softened (Annealed)	SAE AMS-DTL-22499	May Be Mildly Magnetic	0000000	000000

1008-1010 Carbon Steel

12" × 12"
Thick.	Thick. Tolerance	No. of Layers	Min. Hardness	Temper Rating	Specifications Met	Magnetic Properties		Each
0.002" Layer Thick. (-0.0002" to 0.0002" Tolerance)
0.124"	-0.003" to 0.012"	56	Rockwell B60	Softened (Annealed)	Fed. Spec. QQ-S-698, SAE AMS-DTL-22499	Magnetic	0000000	000000
20" × 24"
0.002" Layer Thick. (-0.0002" to 0.0002" Tolerance)
0.124"	-0.003" to 0.012"	56	Rockwell B60	Softened (Annealed)	Fed. Spec. QQ-S-698, SAE AMS-DTL-22499	Magnetic	0000000	000000

260 Brass

8" × 24"
Thick.	Thick. Tolerance	No. of Layers	Min. Hardness	Temper Rating	Specifications Met	Magnetic Properties		Each
0.002" Layer Thick. (-0.0002" to 0.0002" Tolerance)
0.124"	-0.003" to 0.012"	56	Not Rated	1/2 Hard	SAE AMS-DTL-22499	Nonmagnetic	0000000	0000000
12" × 12"
0.002" Layer Thick. (-0.0002" to 0.0002" Tolerance)
0.124"	-0.003" to 0.012"	56	Not Rated	1/2 Hard	SAE AMS-DTL-22499	Nonmagnetic	0000000	000000

Polyimide Plastic

					12" × 12"
Thick.	Thick. Tolerance	No. of Layers	Temperature Range, °F	Specifications Met		Each
0.002" Layer Thick. (-0.0002" to 0.0002" Tolerance)
0.124"	-0.003" to 0.012"	61	0° to 250°	ASTM D5213, SAE AMS-DTL-22499	0000000	0000000

Made-to-Order Peel-Away Layered Shims

For unique shim shapes or sizes, send a dimensioned STEP or DXF file to chi.sales@mcmaster.com and we’ll precision cut your shim. Shims are made of layers of metal bonded with adhesive; remove layers with a utility knife until you get the thickness you need. To make the layers easier to pull apart, gently heat the shim to soften the adhesive. Shims include a material certificate with traceable lot number and test report.

Please leave at least 1/8" wall between shim edge and holes. Minimum hole size is 1/8". 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.

For accurate leveling, choose materials such as steel or stainless steel, which are hard enough to resist scratching and deforming. Softer shims, like brass or aluminum, can be used as wear plates between components that rub together, preventing damage to equipment.

18-8 stainless steel shims are more corrosion resistant than carbon steel shims.

Carbon steel shims have excellent strength and can be welded, but aren't as corrosion resistant as other shims.

Aluminum shims are lightweight and nonmagnetic. They have good corrosion resistance.

Brass shims are corrosion resistant and nonmagnetic.

2" × 2" Max. Shim Size
Thick.	Thick. Tolerance	Min. Hole Size	Min. Wall Thick.	Cutout Tolerance	No. of Layers	Layer Thick.	Min. Hardness	Max. Hardness	Specifications Met		Pkg. of 16
18-8 Stainless Steel—ASTM A240
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Rockwell B80	Rockwell B92	ASTM A240	000000000	0000000
1008-1010 Carbon Steel—Fed. Spec. QQ-S-698
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Rockwell B54	Rockwell B65	Fed. Spec. QQ-S-698	000000000	000000
1100 Aluminum—ASTM B209, SAE AMS-DTL-22499
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Not Rated	__	ASTM B209, SAE AMS-DTL-22499	000000000	000000
260 Brass—ASTM B36
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Not Rated	__	ASTM B36	000000000	000000
											Pkg. of 4
5" × 5" Max. Shim Size
18-8 Stainless Steel—ASTM A240
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Rockwell B80	Rockwell B92	ASTM A240	000000000	000000
1008-1010 Carbon Steel—Fed. Spec. QQ-S-698
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Rockwell B54	Rockwell B65	Fed. Spec. QQ-S-698	000000000	000000
1100 Aluminum—ASTM B209, SAE AMS-DTL-22499
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Not Rated	__	ASTM B209, SAE AMS-DTL-22499	000000000	000000
260 Brass—ASTM B36
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Not Rated	__	ASTM B36	000000000	000000
											Pkg. of 9
7" × 7" Max. Shim Size
18-8 Stainless Steel—ASTM A240
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Rockwell B80	Rockwell B92	ASTM A240	000000000	000000
1008-1010 Carbon Steel—Fed. Spec. QQ-S-698
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Rockwell B54	Rockwell B65	Fed. Spec. QQ-S-698	000000000	000000
1100 Aluminum—ASTM B209, SAE AMS-DTL-22499
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Not Rated	__	ASTM B209, SAE AMS-DTL-22499	000000000	000000
260 Brass—ASTM B36
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Not Rated	__	ASTM B36	000000000	000000
											Pkg. of 4
11" x 11" Max. Shim Size
18-8 Stainless Steel—ASTM A240
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Rockwell B80	Rockwell B92	ASTM A240	000000000	000000
1008-1010 Carbon Steel—Fed. Spec. QQ-S-698
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Rockwell B54	Rockwell B65	Fed. Spec. QQ-S-698	000000000	000000
1100 Aluminum—ASTM B209, SAE AMS-DTL-22499
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Not Rated	__	ASTM B209, SAE AMS-DTL-22499	000000000	000000
260 Brass—ASTM B36
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Not Rated	__	ASTM B36	000000000	000000
											Pkg. of 1
23" x 23" Max. Shim Size
18-8 Stainless Steel—ASTM A240
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Rockwell B80	Rockwell B92	ASTM A240	000000000	000000
1008-1010 Carbon Steel—Fed. Spec. QQ-S-698
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Rockwell B54	Rockwell B65	Fed. Spec. QQ-S-698	000000000	000000
1100 Aluminum—ASTM B209, SAE AMS-DTL-22499
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Not Rated	__	ASTM B209, SAE AMS-DTL-22499	000000000	000000
260 Brass—ASTM B36
0.124"	-0.0062" to 0.0062"	1/8"	1/8"	-0.01" to 0.01"	62	0.002"	Not Rated	__	ASTM B36	000000000	000000