0.004" Shims | McMaster-Carr

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.

Sheets—Shim stock comes in sheets that are flat packed.

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.

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

High-Strength 17-7 PH Stainless Steel—Similar in strength to steel, it won’t rust in wet and outdoor areas but can’t withstand harsh chemicals like 316 stainless steel.

Extreme-Strength 17-4 PH Stainless Steel—Stronger than 17-7 PH stainless steel, it won’t rust in wet and outdoor areas but can’t withstand harsh chemicals like 316 stainless steel.

Carbon Steel—Best for dry areas since moisture will cause it to rust.

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.

Aluminum and 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.

Brass—Picked for its warm, polished look. Similar to 18-8 stainless steel, it resists rusting in wet and outdoor areas.

Copper—A good conductor of heat, it’s often used to install heat sinks. As our softest metal, it prevents component damage but may not retain its shape as well as other metals.

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.

	Thk. Tolerance	Temper Rating	Color	Type	Certificate Form	Specs. Met	Form	Pkg. Qty.		Pkg.
18-8 Stainless Steel





			6" Wide × 25" Long
			0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906, SAE AMS5913	Sheet	1	0000000	000000



					6" Wide × 50" Long
					0.004"	-0.0002" to 0.0002"	1/2 Hard	—	Material Certificate	Paper	ASTM A666	Roll	1	0000000	00000
					0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906, SAE AMS5913	Roll	1	0000000	00000



							6" Wide × 100" Long
							0.004"	-0.0002" to 0.0002"	1/2 Hard	—	Material Certificate	Paper	ASTM A666	Roll	1	00000000	00000
							0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906, SAE AMS5913	Roll	1	00000000	00000



									8" Wide × 12" Long
									0.004"	-0.0002" to 0.0002"	1/2 Hard	—	Material Certificate	Paper	ASTM A666	Sheet	1	00000000	0000
									0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906, SAE AMS5913	Sheet	1	00000000	00000



											10" Wide × 12" Long
											0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906	Sheet	1	00000000	00000



													12" Wide × 24" Long
													0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906	Sheet	1	00000000	00000



															12" Wide × 50" Long
															0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906, SAE AMS5913	Roll	1	0000000	00000



																	12" Wide × 100" Long
																	0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906, SAE AMS5913	Roll	1	0000000	00000



																			12" Wide × 120" Long
																			0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906	Roll	1	00000000	000000



																					24" Wide × 24" Long
																					0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906, SAE AMS5913	Sheet	1	00000000	00000



																							24" Wide × 50" Long
																							0.004"	-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM A666, SAE AMS5906, SAE AMS5913	Roll	1	0000000	00000

																							Super-Corrosion-Resistant 316 Stainless Steel





	6" Wide × 25" Long
	0.004"																								-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, ASTM A666, SAE AMS5507, SAE AMS5524	Sheet	1	00000000	00000



																									6" Wide × 50" Long
			0.004"																						-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, SAE AMS5507, SAE AMS5524	Roll	1	00000000	00000



																									6" Wide × 100" Long
																									0.004"	-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, SAE AMS5507, SAE AMS5524	Roll	1	00000000	00000



																									8" Wide × 12" Long
																									0.004"	-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, SAE AMS5507, SAE AMS5524	Sheet	1	0000000	00000



																									10" Wide × 12" Long
																									0.004"	-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, ASTM A666, SAE AMS5507, SAE AMS5524	Sheet	1	00000000	00000



										12" Wide × 12" Long
										0.004"																-0.00025" to 0.00025"	—	—	Material Certificate	Paper	ASTM A240, SAE AMS5507, SAE AMS5524	Sheet	1	00000000	00000



											12" Wide × 24" Long
											0.004"																-0.00025" to 0.00025"	—	—	Material Certificate	Paper	ASTM A240, SAE AMS5507, SAE AMS5524	Sheet	1	00000000	00000



																											12" Wide × 50" Long
													0.004"														-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, SAE AMS5507, SAE AMS5524	Roll	1	00000000	00000



																											12" Wide × 100" Long
															0.004"												-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, SAE AMS5507, SAE AMS5524	Roll	1	00000000	000000



																											12" Wide × 120" Long
																	0.004"										-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, ASTM A666, SAE AMS5507, SAE AMS5524	Roll	1	00000000	000000



																											24" Wide × 24" Long
																			0.004"								-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, ASTM A666, SAE AMS5507, SAE AMS5524	Sheet	1	0000000	00000



																											24" Wide × 50" Long
																					0.004"						-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, SAE AMS5507, SAE AMS5524	Roll	1	00000000	000000



																											24" Wide × 100" Long
																											0.004"	-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A240, SAE AMS5507, SAE AMS5524	Roll	1	00000000	000000

High-Strength 17-7 PH Stainless Steel





		6" Wide × 50" Long
		0.004"																						-0.0002" to 0.0002"			Full Hard	—	Material Certificate	Paper	ASTM A693	Roll	1	0000000	00000

		Extreme-Strength 17-4 PH Stainless Steel





																											4" Wide × 60" Long
																											0.004"	-0.0002" to 0.0002"	—	—	Material Certificate	Paper	ASTM A693	Roll	1	0000000	000000

					Carbon Steel





								6" Wide × 12" Long
								0.004"																				-0.0005" to 0.0005"	Full Hard	—	Material Certificate	Paper	ASTM A109	Sheet	1	00000000	0000



																												6" Wide × 25" Long
									0.004"																			-0.0005" to 0.0005"	Full Hard	—	Material Certificate	Paper	ASTM A109	Sheet	1	00000000	0000



										6" Wide × 50" Long
										0.004"																		-0.0005" to 0.0005"	Full Hard	—	Material Certificate	Paper	—	Roll	1	00000000	0000



											6" Wide × 100" Long
											0.004"																		-0.0005" to 0.0005"	Full Hard	—	Material Certificate	Paper	—	Roll	1	00000000	00000



																													6" Wide × 180" Long
													0.004"	-0.0005" to 0.0005"															Full Hard	—	Material Certificate	Paper	—	Roll	1	00000000	00000



															8" Wide × 12" Long
															0.004"														-0.0005" to 0.0005"	Full Hard	—	Material Certificate	Paper	ASTM A109	Sheet	5	00000000	00000



																	12" Wide × 120" Long
																	0.004"												-0.0005" to 0.0005"	Full Hard	—	Material Certificate	Paper	—	Roll	1	00000000	00000



																													24" Wide × 24" Long
																			0.004"										-0.0005" to 0.0005"	Full Hard	—	Material Certificate	Paper	ASTM A109	Sheet	1	00000000	00000

																			Stress-Resistant Spring Steel





																					6" Wide × 12" Long
	0.004"																				-0.0003" to 0.0003"	Full Hard							—	Material Certificate	Paper	ASTM A684, SAE AMS5122	Sheet	1	00000000	00000



																						6" Wide × 25" Long
		0.004"																				-0.0003" to 0.0003"							Full Hard	—	Material Certificate	Paper	ASTM A684, SAE AMS5122	Sheet	1	0000000	00000



				6" Wide × 50" Long
				0.004"																		-0.0003" to 0.0003"	Full Hard						—	Material Certificate	Paper	ASTM A682, ASTM A684, MIL-S-7947	Roll	1	0000000	00000



																							6" Wide × 100" Long
					0.004"																		-0.0003" to 0.0003"						Full Hard	—	Material Certificate	Paper	ASTM A684, SAE AMS5122	Roll	1	00000000	00000



							8" Wide × 12" Long
							0.004"																-0.0003" to 0.0003"	Full Hard					—	Material Certificate	Paper	ASTM A684, SAE AMS5122	Sheet	1	00000000	00000

							Aluminum





																											6" Wide × 50" Long
																											0.004"		-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM B209	Roll	1	0000000	00000



																									6" Wide × 100" Long
																									0.004"				-0.0002" to 0.0002"	Full Hard	—	Material Certificate	Paper	ASTM B209	Roll	1	0000000	00000

										Painted Aluminum





												6" Wide × 24" Long
												0.004"																	-0.0004" to 0.0004"	1/2 Hard to Full Hard	Beige	Material Certificate	Paper	—	Sheet	1	0000000	0000



													12" Wide × 24" Long
													0.004"																-0.0004" to 0.0004"	1/2 Hard to Full Hard	Beige	Material Certificate	Paper	—	Sheet	1	0000000	00000

													Brass





																													6" Wide × 50" Long
																													0.004"	-0.0004" to 0.0004"	1/2 Hard	—	Material Certificate	Paper	ASTM B36	Roll	1	00000000	00000



6" Wide × 60" Long
0.004"																													-0.0004" to 0.0004"	1/2 Hard	—	Material Certificate	Paper	ASTM B36	Roll	1	0000000	00000



																			6" Wide × 100" Long
	0.004"																		-0.0004" to 0.0004"	1/2 Hard									—	Material Certificate	Paper	ASTM B36	Roll	1	0000000	00000



																				8" Wide × 12" Long
		0.004"																		-0.0004" to 0.0004"									1/2 Hard	—	Material Certificate	Paper	ASTM B36	Sheet	1	00000000	0000



																				12" Wide × 120" Long
				0.004"																-0.0004" to 0.0004"	1/2 Hard								—	Material Certificate	Paper	ASTM B36	Roll	1	0000000	00000

				Copper





																					6" Wide × 50" Long
																					0.004"	-0.0003" to 0.0003"							—	—	Material Certificate	Paper	ASTM B152	Roll	1	0000000	00000



																						6" Wide × 100" Long
																						0.004"							-0.0003" to 0.0003"	—	—	Material Certificate	Paper	ASTM B152	Roll	1	0000000	00000



																													8" Wide × 12" Long
																													0.004"	-0.0003" to 0.0003"	—	—	Material Certificate	Paper	ASTM B152	Sheet	1	00000000	00000

									Ultra-Chemical-Resistant PTFE





										6" Wide × 50" Long
										0.004"																				-0.0004" to 0.0004"	—	White	—	—	ASTM D3308, MIL-P-22241	Roll	1	00000000	00000



											8" Wide × 12" Long
											0.004"																			-0.0004" to 0.0004"	—	White	—	—	ASTM D3308, MIL-P-22241	Sheet	1	00000000	0000

											Plastic





																														5" Wide × 20" Long
																												0.004"		-0.0002" to 0.0002"	—	Beige	—	—	—	Sheet	1	0000000	0000



																												10" Wide × 20" Long
															0.004"	-0.0002" to 0.0002"												—		Beige	—	—	—	Sheet	1	0000000	0000



12" Wide × 24" Long
0.004"																	-0.0002" to 0.0002"											—		Beige	—	—	—	Sheet	1	00000000	00000



																	20" Wide × 20" Long
	0.004"																-0.0002" to 0.0002"	—										Beige		—	—	—	Sheet	1	0000000	00000



																		20" Wide × 50" Long
		0.004"																-0.0002" to 0.0002"										—		Beige	—	—	—	Sheet	1	00000000	00000
		0.004"	-0.0002" to 0.0002"															—										Beige		—	—	—	Roll	1	0000000	00000

Adhesive-Back Shim Stock

Stick with confidence—a durable adhesive keeps this shim stock from sliding out of place. Cut the shim stock 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.

Sheets—Shim stock comes in sheets that are flat packed.

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.

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

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.

Brass—Picked for its warm, polished look. Similar to 18-8 stainless steel, it resists rusting in wet and outdoor areas.

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.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

							Certificate
	Thk.	Thk. Tolerance	Material Thk.	Adhesive Thk.	Adhesive Type	Temper Rating	Type	Form	Specs. Met	Form		Each
18-8 Stainless Steel





				8" Wide × 12" Long
				0.004"	-0.0001" to 0.0001"	0.002"	0.002"	Acrylic	Full Hard	Material Certificate	Digital	ASTM A666	Sheet	00000000	000000

				Super-Corrosion-Resistant 316 Stainless Steel





								8" Wide × 12" Long
								0.004"	-0.0001" to 0.0001"	0.002"	0.002"	Acrylic	—	Material Certificate	Digital	ASTM A666	Sheet	00000000	00000

								Aluminum





												6" Wide × 12" Long
												0.004"	-0.0002" to 0.0002"	0.002"	0.002"	Acrylic	—	Material Certificate	Digital	ASTM B479	Sheet	00000000	00000

												Brass





																8" Wide × 12" Long
																0.004"	-0.0002" to 0.0002"	0.002"	0.002"	Acrylic	1/2 Hard	Material Certificate	Digital	ASTM B36	Sheet	00000000	00000

Tape-Style Shim Stock

Unroll to your desired length, cut into custom shapes, and stick in place. With thickness tolerances as fine as a strand of hair, the shims you create will precisely align, space, and level components on dies, presses, and machinery.

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.

	Lg., ft.	Thk.	Thk. Tolerance	Material Thk.	Adhesive Type	Adhesive Thk.		Each
18-8 Stainless Steel


	1/4"	9	0.004"	-0.0004" to 0.0004"	0.002"	Acrylic	0.002"	0000000	00000
	3/8"	9	0.004"	-0.0004" to 0.0004"	0.002"	Acrylic	0.002"	00000000	0000
	1/2"	9	0.004"	-0.0004" to 0.0004"	0.002"	Acrylic	0.002"	0000000	0000
	5/8"	9	0.004"	-0.0004" to 0.0004"	0.002"	Acrylic	0.002"	00000000	00000
	3/4"	9	0.004"	-0.0004" to 0.0004"	0.002"	Acrylic	0.002"	0000000	00000
	1"	9	0.004"	-0.0004" to 0.0004"	0.002"	Acrylic	0.002"	0000000	00000
	1 1/2"	9	0.004"	-0.0004" to 0.0004"	0.002"	Acrylic	0.002"	0000000	00000
	2"	9	0.004"	-0.0004" to 0.0004"	0.002"	Acrylic	0.002"	0000000	00000
	3"	9	0.004"	-0.0004" to 0.0004"	0.002"	Acrylic	0.002"	0000000	00000

Shims

With thickness tolerances as fine as a strand of hair, 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.

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.

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.

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. Tolerance	ID Tolerance	OD Tolerance	Min. Hardness	Color	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel





			1/32" ID × 7/64" OD
			0.004"	-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	000000



					3/64" ID × 1/8" OD
					0.004"	-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	00000



							1/16" ID × 5/32" OD
							0.004"	-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	00000



									5/64" ID × 5/32" OD
									0.004"	-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	00000



											3/32" ID × 13/64" OD
											0.004"	-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	00000



													1/8" ID × 3/16" OD
													0.004"	-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	00000
													0.004"	-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	0000



															3/16" ID × 1/4" OD
															0.004"	-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	00000
															0.004"	-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	0000



																	1/4" ID × 3/8" OD
																	0.004"	-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	00000
																	0.004"	-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	0000



																			5/16" ID × 1/2" OD
																			0.004"	-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	00000



																					11/32" ID × 13/16" OD
																					0.004"	-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	0000



																							3/8" ID × 9/16" OD
																							0.004"	-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	00000



																									3/8" ID × 5/8" OD
0.004"																									-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	00000



	1/2" ID × 3/4" OD
	0.004"	-0.0005" to 0.0005"																							0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	25	000000000	00000
	0.004"	-0.0005" to 0.0005"																							0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	00000



			5/8" ID × 1" OD
			0.004"	-0.0005" to 0.0005"																					0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	00000



					3/4" ID × 1 1/8" OD
					0.004"																				-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	00000



																									7/8" ID × 1 3/8" OD
							0.004"																		-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	00000



																									1" ID × 1 1/2" OD
									0.004"																-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	00000



																									1 1/8" ID × 1 5/8" OD
											0.004"														-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	0000



																									1 1/4" ID × 1 3/4" OD
																									0.004"	-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	00000



																									1 3/8" ID × 1 7/8" OD
																									0.004"	-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	0000



																									1 1/2" ID × 2 1/8" OD
																									0.004"	-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	00000



																		1 3/4" ID × 2 3/4" OD
																		0.004"								-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	00000



																			2" ID × 2 3/4" OD
																			0.004"								-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	00000

																			Super-Corrosion-Resistant 316 Stainless Steel





																											1/8" ID × 3/16" OD
																											0.004"	-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	0000



																							3/16" ID × 1/4" OD
																							0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	0000



																							1/4" ID × 3/8" OD
																							0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	0000



																							11/32" ID × 13/16" OD
																							0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	00000



																							3/8" ID × 5/8" OD
																							0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	00000



																							1/2" ID × 3/4" OD
																							0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	00000



																							5/8" ID × 1" OD
																							0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	10	000000000	00000



																							3/4" ID × 1 1/8" OD
																							0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	0000



																							7/8" ID × 1 3/8" OD
																							0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	0000



																							1" ID × 1 1/2" OD
																							0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"	Rockwell B70	—	ASTM A240	5	000000000	0000

																							Carbon Steel





																											1/8" ID × 3/16" OD
																											0.004"	-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B65	—	—	5	00000000	0000



																			3/16" ID × 1/4" OD
																			0.004"										-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B65	—	—	5	00000000	0000



																					1/4" ID × 3/8" OD
																					0.004"	-0.0005" to 0.0005"			0" to 0.011"				-0.002" to 0.002"	Rockwell B65	—	—	10	00000000	0000



																					11/32" ID × 13/16" OD
																					0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"			Rockwell B65	—	—	10	00000000	0000



																					3/8" ID × 5/8" OD
																					0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"			Rockwell B65	—	—	10	00000000	0000



																					1/2" ID × 3/4" OD
																					0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"			Rockwell B65	—	—	10	00000000	0000



																					5/8" ID × 1" OD
																					0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"			Rockwell B65	—	—	10	00000000	0000



																					3/4" ID × 1 1/8" OD
																					0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"			Rockwell B65	—	—	10	00000000	00000



																					7/8" ID × 1 3/8" OD
																					0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"			Rockwell B65	—	—	10	00000000	00000



																					1" ID × 1 1/2" OD
																					0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"			Rockwell B65	—	—	10	00000000	00000



																					1 1/8" ID × 1 5/8" OD
																					0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"			Rockwell B65	—	—	10	00000000	00000



																					1 1/4" ID × 1 3/4" OD
																					0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"			Rockwell B65	—	—	10	00000000	00000



																						1 3/8" ID × 1 7/8" OD
																						0.004"			-0.0005" to 0.0005"	0" to 0.011"			-0.002" to 0.002"	Rockwell B65	—	—	10	00000000	00000



																									1 1/2" ID × 2 1/8" OD
																									0.004"	-0.0005" to 0.0005"			0" to 0.011"	-0.002" to 0.002"	Rockwell B65	—	—	10	00000000	00000



																													1 3/4" ID × 2 3/4" OD
																													0.004"	-0.0005" to 0.0005"	0" to 0.011"	-0.002" to 0.002"	Rockwell B65	—	—	10	00000000	00000



																							2" ID × 2 3/4" OD
																							0.004"	-0.0005" to 0.0005"					0" to 0.011"	-0.002" to 0.002"	Rockwell B65	—	—	10	00000000	00000

Brass





		3/32" ID × 13/64" OD
		0.004"																						-0.0005" to 0.0005"			0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	10	000000000	0000



			1/8" ID × 3/16" OD
			0.004"																								-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	10	000000000	0000



																											3/16" ID × 1/4" OD
					0.004"																						-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	10	000000000	0000



																											1/4" ID × 3/8" OD
							0.004"																				-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	10	000000000	00000



																											5/16" ID × 1/2" OD
									0.004"	-0.0005" to 0.0005"																	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	10	000000000	00000



											3/8" ID × 9/16" OD
											0.004"																-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	10	000000000	00000



																											1/2" ID × 3/4" OD
													0.004"														-0.0005" to 0.0005"	0" to 0.005"	-0.005" to 0.005"	Rockwell B70	—	—	10	000000000	00000

													Color-Coded Plastic





																											3/8" ID × 5/8" OD
																											0.004"	-0.0002" to 0.0002"	0" to 0.015"	-0.005" to 0.005"	—	Beige	—	10	000000000	00000



																											1/2" ID × 3/4" OD
																											0.004"	-0.0002" to 0.0002"	0" to 0.015"	-0.005" to 0.005"	—	Beige	—	10	000000000	00000



																											5/8" ID × 1" OD
																											0.004"	-0.0002" to 0.0002"	0" to 0.015"	-0.005" to 0.005"	—	Beige	—	10	000000000	00000



																											3/4" ID × 1 1/8" OD
																											0.004"	-0.0002" to 0.0002"	0" to 0.015"	-0.005" to 0.005"	—	Beige	—	10	000000000	00000



1" ID × 1 1/2" OD
0.004"																											-0.0002" to 0.0002"	0" to 0.015"	-0.005" to 0.005"	—	Beige	—	10	000000000	00000



	1 1/4" ID × 1 3/4" OD
	0.004"																										-0.0002" to 0.0002"	0" to 0.015"	-0.005" to 0.005"	—	Beige	—	10	000000000	00000



		1 1/2" ID × 2 1/8" OD
		0.004"																									-0.0002" to 0.0002"	0" to 0.015"	-0.005" to 0.005"	—	Beige	—	10	000000000	00000



																											1 3/4" ID × 2 3/4" OD
			0.004"																								-0.0002" to 0.0002"	0" to 0.015"	-0.005" to 0.005"	—	Beige	—	10	000000000	00000



																											2" ID × 2 3/4" OD
					0.004"																						-0.0002" to 0.0002"	0" to 0.015"	-0.005" to 0.005"	—	Beige	—	10	000000000	00000

Slotted Shims

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

Tab 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.

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						Each
	Thk.	Thk. Tolerance	For Max. Screw Size	Wd.	Dp.	Min. Hardness	Identification Type	End Shape		1-9	10-Up		Each
18-8 Stainless Steel





				1" Lg. × 1" Wd. (Shim Trade Size AAA)
				0.004"	-0.0002" to 0.0002"	1/4"	5/16"	5/8"	Rockwell C42	Labeled	Tab	000000000	00000	00000	0000000	00000



						1 1/2" Lg. × 1 1/2" Wd. (Shim Trade Size AA)
						0.004"	-0.0002" to 0.0002"	3/8"	7/16"	61/64"	Rockwell B85	Labeled	Tab	000000000	0000	0000	0000000	0000



								2" Lg. × 2" Wd. (Shim Trade Size A)
								0.004"	-0.0002" to 0.0002"	1/2"	9/16"	1 9/32"	Rockwell B85	Labeled	Tab	0000000	0000	0000	000000000	0000



										2 1/2" Lg. × 2 1/2" Wd. (Shim Trade Size BB)
										0.004"	-0.0002" to 0.0002"	5/8"	11/16"	1 19/32"	Rockwell B85	Labeled	Tab	000000000	0000	0000	000000000	0000



												3" Lg. × 3" Wd. (Shim Trade Size B)
												0.004"	-0.0002" to 0.0002"	3/4"	13/16"	1 29/32"	Rockwell B85	Labeled	Tab	0000000	0000	0000	00000000	0000



														4" Lg. × 4" Wd. (Shim Trade Size C)
														0.004"	-0.0002" to 0.0002"	1 1/8"	1 3/16"	2 19/32"	Rockwell B85	Labeled	Tab	0000000	0000	0000	00000000	0000



																5" Lg. × 5" Wd. (Shim Trade Size D)
																0.004"	-0.0002" to 0.0002"	1 1/2"	1 9/16"	3 9/32"	Rockwell B85	Labeled	Tab	0000000	0000	0000	000000000	0000



																		6" Lg. × 5" Wd. (Shim Trade Size DD)
																		0.004"	-0.0002" to 0.0002"	1 1/2"	1 9/16"	4 1/2"	Rockwell C42	Labeled	Tab	000000000	0000	0000	———	0



																				6" Lg. × 6" Wd. (Shim Trade Size E)
																				0.004"	-0.0002" to 0.0002"	1 7/8"	1 15/16"	4"	Rockwell B85	Labeled	Tab	000000000	0000	0000	00000000	0000



																						6" Lg. × 6" Wd. (Shim Trade Size G)
																						0.004"	-0.0002" to 0.0002"	2 1/4"	2 5/16"	4 3/16"	Rockwell B85	Labeled	Tab	000000000	0000	0000	00000000	0000



																								8" Lg. × 8" Wd. (Shim Trade Size H)
																								0.004"	-0.0002" to 0.0002"	2 1/4"	2 5/16"	5 3/16"	Rockwell B85	Labeled	Tab	000000000	0000	0000	000000000	0000

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.

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 1/2" Diameter Shafts
				0.004"	-0.0004" to 0.0004"	1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	1/8"	3/64"	Rockwell B80	10	000000000	000000



						For 3/4" Diameter Shafts
						0.004"	-0.0004" to 0.0004"	3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	10	000000000	00000



								For 7/8" Diameter Shafts
								0.004"	-0.0004" to 0.0004"	7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	3/16"	5/64"	Rockwell B80	10	000000000	00000



										For 1" Diameter Shafts
										0.004"	-0.0004" to 0.0004"	1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1/4"	3/32"	Rockwell B80	10	000000000	00000



												For 1 1/4" Diameter Shafts
												0.004"	-0.0004" to 0.0004"	1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	5/16"	1/8"	Rockwell B80	10	000000000	00000



														For 1 1/2" Diameter Shafts
														0.004"	-0.0004" to 0.0004"	1 1/2"	0" to 0.011"	2 1/8"	-0.002" to 0.002"	3/8"	5/32"	Rockwell B80	5	000000000	0000



																For 2" Diameter Shafts
																0.004"	-0.0004" to 0.0004"	2"	0" to 0.011"	2 3/4"	-0.002" to 0.002"	1/2"	3/16"	Rockwell B80	5	000000000	00000

Made-to-Order Shims

Image of Product. Front orientation. Shims. Sold Individually, Made-to-Order.

If you need a unique shim shape or size, we’ll precision cut it for you. With thickness tolerances as fine as a strand of hair, 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.

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.

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	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


		0.004"	-0.0002" to 0.0002"	Rockwell C42	Material Certificate	ASTM A240	16	000000000	000000	4	000000000	000000	9	000000000	000000	4	000000000	000000	1	000000000	000000

		Super-Corrosion-Resistant 316 Stainless Steel


				0.004"	-0.0002" to 0.0002"	Not Rated	Material Certificate	ASTM A240, Fed. Spec. QQ-S-766	16	000000000	00000	4	000000000	00000	9	000000000	000000	4	000000000	000000	1	000000000	000000

				Carbon Steel


						0.004"	-0.0002" to 0.0002"	Rockwell B90	Material Certificate	ASTM A109, Fed. Spec. QQ-S-698	16	000000000	00000	4	000000000	00000	9	000000000	00000	4	000000000	00000	1	000000000	00000

						Brass


								0.004"	-0.0002" to 0.0002"	Rockwell B60	Material Certificate	ASTM B36, Fed. Spec. QQ-B-613	16	000000000	00000	4	000000000	00000	—	———	0	—	———	0	—	———	0

Wave Spring Lock Washers

The wavy shape flexes like a spring to keep nuts and screws secure on slightly uneven surfaces. These washers add a small amount of tension to stop fasteners from backing out due to mild vibration. While they don't hold as well as other lock washers, they do grip slightly better than curved washers. They work best in electrical panels, light fixtures, and other light duty assemblies. Since these washers hold their shape when untightened, you can reuse them a handful of times without losing strength.

18-8 Stainless Steel—The choice for wet and outdoor environments, these washers won't rust when exposed to moisture. However, they can't hold up to the harsh chemicals that 316 stainless steel can.

Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these washers have a dark, matte coating to create a finished look. They won't rust in wet and outdoor environments, but can't hold up to harsh chemicals as well as 316 stainless steel.

Super-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.

	No. of Waves	ID	OD	Thk.	Overall Ht.	Pkg. Qty.		Pkg.
18-8 Stainless Steel


	No. 2	1	0.095"	0.130"	0.004"	0.040"	10	000000000	00000
	No. 5	1	0.135"	0.245"	0.004"	0.055"	10	000000000	0000

	Black-Oxide 18-8 Stainless Steel


			No. 5	1	0.135"	0.245"	0.004"	0.055"	10	000000000	00000

			Super-Corrosion-Resistant 316 Stainless Steel


					No. 2	1	0.095"	0.130"	0.004"	0.040"	10	000000000	00000