Adhesive Washers | McMaster-Carr

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Screw Size

Material

1008-1010 Low-Carbon Steel

Shape

Specifications Met

Adhesive Thickness

Performance

Maximum Temperature

Hardness

REACH

DFARS Specialty Metals

Exempt

Not Compliant

RoHS

Compliant

Compliant with Exemptions

Export Control Classification Number (ECCN)

EAR99

Minimum Temperature

-300° F

50° F

Adhesive Type

3M VHB (Very High Bond)

Minimum Hardness

Mount Type

Number of Layers

Magnetic Properties

Magnetic

May Be Mildly Magnetic

Maximum Shim Size

Certificate Type

Material Certificate with Traceable Lot Number

Material Certificate with Traceable Lot Number and Test Report

Temper Rating

Maximum Hardness

184 Products

Adhesive-Back Washers

Stick these washers on your mounting surface, and they won't slip out of position while you fasten. They take the pressure off screws and nuts to protect your material.

Stainless Steel About Stainless Steel

Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these washers won't degrade when exposed to harsh weather, salt water, and most chemicals.

					Adhesive		Temp. Range, ° F
	For Screw Size	ID	OD	Thk.	Type	Thk.	Min.	Max.	Specs. Met	Pkg. Qty.		Pkg.
Highly Corrosion-Resistant 316 Stainless Steel



		No. 4	0.125"	0.312"	0.031"	Acrylic	0.01"	50	200	—	5	000000000	00000


		No. 6	0.146"	0.312"	0.031"	Acrylic	0.01"	50	200	—	5	000000000	0000
		No. 8	0.172"	0.354"	0.031"	Acrylic	0.01"	50	200	—	5	000000000	0000
		No. 10	0.203"	0.512"	0.039"	Acrylic	0.01"	50	200	—	5	000000000	0000
		1/4"	0.281"	0.625"	0.039"	Acrylic	0.01"	50	200	—	5	000000000	0000
		5/16"	0.327"	0.750"	0.039"	Acrylic	0.039"	50	200	—	5	000000000	0000
		3/8"	0.406"	0.875"	0.039"	Acrylic	0.039"	50	200	—	5	000000000	0000
		7/16"	0.500"	1.125"	0.059"	Acrylic	0.039"	50	200	—	1	000000000	0000
		1/2"	0.531"	1.250"	0.059"	Acrylic	0.039"	50	200	—	1	000000000	0000
		5/8"	0.688"	1.500"	0.059"	Acrylic	0.039"	50	200	—	1	000000000	0000
		3/4"	0.827"	1.575"	0.079"	Acrylic	0.039"	50	200	—	1	000000000	0000


		1"	1.062"	2.000"	0.118"	Acrylic	0.039"	50	200	—	1	000000000	0000
		M3	3.2 mm	8.0 mm	0.8 mm	Acrylic	0.25 mm	50	200	DIN 125	5	000000000	0000
		M4	4.3 mm	9.0 mm	0.8 mm	Acrylic	0.25 mm	50	200	DIN 125	5	000000000	0000
		M5	5.4 mm	12.7 mm	1.0 mm	Acrylic	0.25 mm	50	200	DIN 125	5	000000000	0000
		M6	6.6 mm	16.0 mm	1.0 mm	Acrylic	0.25 mm	50	200	DIN 125	5	000000000	0000
		M8	8.4 mm	19.0 mm	1.0 mm	Acrylic	1 mm	50	200	DIN 125	5	000000000	0000
		M10	10.3 mm	22.0 mm	1.0 mm	Acrylic	1 mm	50	200	DIN 125	5	000000000	0000
		M12	13.0 mm	24.0 mm	2.0 mm	Acrylic	1 mm	50	200	DIN 125	1	000000000	0000

Peel-Away Multilayer Shims

Image of Product. Front orientation. Shims. Peel Away, Round, Multilayer, Sold Individually.

Fine-tune thickness without worrying about stacking multiple shims. These shims are 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.

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.

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.

	Thk. Tolerance	ID Tolerance	OD Tolerance	No. of Layers	Layer Thk.	Min. Hardness	Certificate Type	Specs. Met	Mil. Spec.		Each
18-8 Stainless Steel







			3/8" ID × 5/8" OD

			0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Rockwell B75	—	ASTM A666	—	000000000	000000


			0.062"	-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Rockwell B75	—	ASTM A666	—	000000000	00000




					1/2" ID × 3/4" OD

					0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Rockwell B75	—	ASTM A666	—	000000000	00000


					0.062"	-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Rockwell B75	—	ASTM A666	—	000000000	00000




							5/8" ID × 1" OD

							0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Rockwell B75	—	ASTM A666	—	000000000	00000


							0.062"	-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Rockwell B75	—	ASTM A666	—	000000000	00000
							0.125"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Rockwell B75	—	ASTM A666	—	000000000	00000




									3/4" ID × 1 1/8" OD

									0.125"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Rockwell B75	—	ASTM A666	—	000000000	00000




											7/8" ID × 1 3/8" OD

											0.125"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Rockwell B75	—	ASTM A666	—	000000000	00000


											Aluminum







															3/8" ID × 5/8" OD

															0.032"	-0.002" to 0.003"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	—	—	000000000	0000


															0.062"	-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	—	—	000000000	0000




															1/2" ID × 3/4" OD

	0.032"	-0.002" to 0.003"													-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	—	—	000000000	0000


	0.062"	-0.002" to 0.006"													-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	—	—	000000000	00000




															5/8" ID × 1" OD

			0.032"	-0.002" to 0.003"											-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	—	—	000000000	00000


			0.125"	-0.003" to 0.012"											-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Not Rated	—	—	—	000000000	00000




															1" ID × 1 1/2" OD

					0.062"	-0.002" to 0.006"									-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	—	—	000000000	00000


					0.125"	-0.003" to 0.012"									-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Not Rated	—	—	—	000000000	00000




															1 1/2" ID × 2 1/8" OD

							0.125"								-0.003" to 0.012"	-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Not Rated	—	—	—	000000000	00000


							Brass







															0.135" ID × 0.234" OD

															0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	—	—	000000000	0000




															0.193" ID × 3/8" OD

															0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	—	—	000000000	0000




															0.255" ID × 1/2" OD

															0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	Material Certificate	—	—	000000000	0000




															3/8" ID × 5/8" OD

															0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000


															0.062"	-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000




															1/2" ID × 3/4" OD

															0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000


															0.062"	-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000




															5/8" ID × 1" OD

															0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000


															0.062"	-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000
															0.125"	-0.003" to 0.012"	-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000




															3/4" ID × 1 1/8" OD

															0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000


							0.062"								-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000
							0.125"	-0.003" to 0.012"							-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000




									7/8" ID × 1 3/8" OD

									0.032"	-0.005" to 0.005"					-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000


									0.062"	-0.002" to 0.006"					-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000
									0.125"	-0.003" to 0.012"					-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000




											1" ID × 1 1/2" OD

											0.032"	-0.005" to 0.005"			-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000


											0.062"	-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000
											0.125"	-0.003" to 0.012"	-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000




											1 1/4" ID × 1 3/4" OD

											0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000


											0.062"	-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000
											0.125"	-0.003" to 0.012"	-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000




											1 1/2" ID × 2 1/8" OD

											0.032"	-0.005" to 0.005"	-0.01" to 0.01"	-0.01" to 0.01"	16	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000


											0.062"	-0.002" to 0.006"	-0.01" to 0.01"	-0.01" to 0.01"	31	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000
											0.125"	-0.003" to 0.012"	-0.01" to 0.01"	-0.01" to 0.01"	62	0.002"	Not Rated	—	ASTM B36, SAE AMS-DTL-22499	MIL-S-5697	000000000	00000

Multipole Neodymium Disc Magnets

Grip thin metal surfaces where standard magnets fail to hold. These magnets have multiple small poles that generate a shallow, concentrated magnetic field only near the surface. This makes them less likely to accidentally stick to nearby objects. They're often used to mount sensors on thin-walled enclosures or control panels. With the highest strength-to-size ratio of any magnet, these deliver powerful pull force even in tight spaces. Also known as Polymagnets®.

Warning: Maximum pull ratings are based on direct contact with rust-free, unpainted iron surfaces. Variations in material condition will significantly reduce these ratings. Do not use for lifting over people.

Magnets With Adhesive Back and Unthreaded Hole


	Magnetized Through Thickness

Stick in place for fast, tool-free mounting where drilling isn’t practical. The adhesive holds tight without scratching surfaces. For added holding power, mount with pins, bolts, or rivets. There's no need for threading.

Magnetized Through Thickness—Magnetized from one flat face to the other, these magnets deliver a concentrated magnetic force. They’re best for direct contact with flat surfaces.

											Each
	OD	Hole Dia.	Max. Pull, lbf	Sets of Poles	Max. Temp., ° F	Magnet Grade	Direction of Magnetization	Adhesive Type	Mounting Hole Style		1-49	50-Up
1/8" Thick



		1"	0.19"	33	10	180	N42	Through Thickness	3M VHB (Very High Bond)	Straight	0000000	000000	00000


		1 1/2"	1/8"	67	36	180	N42	Through Thickness	3M VHB (Very High Bond)	Straight	0000000	00000	00000

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.

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



		0.008"	-0.0004" to 0.0004"	4	0.002"	Rockwell B80	Material Certificate	ASTM A240	16	000000000	0000000	4	000000000	0000000	9	000000000	0000000	4	000000000	0000000	1	000000000	0000000


		0.016"	-0.0008" to 0.0008"	8	0.002"	Rockwell B80	Material Certificate	ASTM A240	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
		0.032"	-0.0016" to 0.0016"	16	0.002"	Rockwell B80	Material Certificate	ASTM A240	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
		0.048"	-0.0024" to 0.0024"	24	0.002"	Rockwell B80	Material Certificate	ASTM A240	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
		0.062"	-0.0031" to 0.0031"	32	0.002"	Rockwell B80	Material Certificate	ASTM A240	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
		0.124"	-0.0062" to 0.0062"	62	0.002"	Rockwell B80	Material Certificate	ASTM A240	16	000000000	000000	4	000000000	000000	9	000000000	00000000	4	000000000	00000000	1	000000000	00000000


		Carbon Steel



				0.008"	-0.0004" to 0.0004"	4	0.002"	Rockwell B54	Material Certificate	Fed. Spec. QQ-S-698	16	000000000	00000	4	000000000	00000	9	000000000	000000	4	000000000	000000	1	000000000	000000


				0.016"	-0.0008" to 0.0008"	8	0.002"	Rockwell B54	Material Certificate	Fed. Spec. QQ-S-698	16	000000000	00000	4	000000000	00000	9	000000000	000000	4	000000000	000000	1	000000000	000000
				0.032"	-0.0016" to 0.0016"	16	0.002"	Rockwell B54	Material Certificate	Fed. Spec. QQ-S-698	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
				0.048"	-0.0024" to 0.0024"	24	0.002"	Rockwell B54	Material Certificate	Fed. Spec. QQ-S-698	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
				0.062"	-0.0031" to 0.0031"	32	0.002"	Rockwell B54	Material Certificate	Fed. Spec. QQ-S-698	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
				0.124"	-0.0062" to 0.0062"	62	0.002"	Rockwell B54	Material Certificate	Fed. Spec. QQ-S-698	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000


				Aluminum



						0.008"	-0.0004" to 0.0004"	4	0.002"	Not Rated	Material Certificate	ASTM B209, SAE AMS-DTL-22499	16	000000000	00000	4	000000000	00000	9	000000000	000000	4	000000000	000000	1	000000000	000000


						0.016"	-0.0008" to 0.0008"	8	0.002"	Not Rated	Material Certificate	ASTM B209, SAE AMS-DTL-22499	16	000000000	00000	4	000000000	00000	9	000000000	000000	4	000000000	000000	1	000000000	000000
						0.032"	-0.0016" to 0.0016"	16	0.002"	Not Rated	Material Certificate	ASTM B209, SAE AMS-DTL-22499	16	000000000	00000	4	000000000	00000	9	000000000	000000	4	000000000	000000	1	000000000	000000
						0.048"	-0.0024" to 0.0024"	24	0.002"	Not Rated	Material Certificate	ASTM B209, SAE AMS-DTL-22499	16	000000000	00000	4	000000000	00000	9	000000000	000000	4	000000000	000000	1	000000000	000000
						0.062"	-0.0031" to 0.0031"	32	0.002"	Not Rated	Material Certificate	ASTM B209, SAE AMS-DTL-22499	16	000000000	00000	4	000000000	00000	9	000000000	000000	4	000000000	000000	1	000000000	000000
						0.124"	-0.0062" to 0.0062"	62	0.002"	Not Rated	Material Certificate	ASTM B209, SAE AMS-DTL-22499	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000


						Brass



								0.008"	-0.0004" to 0.0004"	4	0.002"	Not Rated	Material Certificate	ASTM B36	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000


								0.016"	-0.0008" to 0.0008"	8	0.002"	Not Rated	Material Certificate	ASTM B36	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
								0.032"	-0.0016" to 0.0016"	16	0.002"	Not Rated	Material Certificate	ASTM B36	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
								0.048"	-0.0024" to 0.0024"	24	0.002"	Not Rated	Material Certificate	ASTM B36	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
								0.062"	-0.0031" to 0.0031"	32	0.002"	Not Rated	Material Certificate	ASTM B36	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000
								0.124"	-0.0062" to 0.0062"	62	0.002"	Not Rated	Material Certificate	ASTM B36	16	000000000	000000	4	000000000	000000	9	000000000	00000000	4	000000000	00000000	1	000000000	00000000