0.80 mm 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.

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.

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

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







				150 mm Wide × 1,250 mm Long

				0.8	-0.04 to 0.04	Full Hard	Material Certificate	Paper	ASTM A666	Roll	00000000	000000


				Carbon Steel







								150 mm Wide × 2,500 mm Long

								0.8	-0.04 to 0.04	Full Hard	Material Certificate	Paper	ASTM A109, Fed. Spec. QQ-S-698	Roll	00000000	00000

Sealing Washers

Prevent leaks while distributing weight evenly under nuts and screws. These washers compress as you tighten to keep air and fluid in, and dust and contaminants out. Use them anywhere you need a tight seal, such as protecting electronics from moisture or keeping lubricants contained in machinery.

Hard Fiber

An economical alternative to metal crush washers, these compress easily to create a seal with less effort. However, fiber washers degrade faster than metal washers and aren't as heat resistant. They also don't seal quite as tightly as their plastic or rubber counterparts. These washers are reusable, as long as the material isn't damaged.

	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Hard Fiber



	M5	5	8	0.8	DIN 7603	100	000000000	00000


	M5	5	10	0.8	DIN 7603	100	000000000	0000
	M6	6	9	0.8	DIN 7603	100	000000000	0000
	M6	6	10	0.8	DIN 7603	100	000000000	0000
	M8	8	12	0.8	DIN 7603	100	000000000	0000
	M8	8	14	0.8	DIN 7603	100	000000000	0000
	M10	10	14	0.8	DIN 7603	100	000000000	0000
	M12	12	16	0.8	DIN 7603	100	000000000	0000
	M12	12	20	0.8	DIN 7603	100	000000000	0000
	M12	12	24	0.8	DIN 7603	100	000000000	0000
	M14	14	24	0.8	DIN 7603	100	000000000	0000


	M16	16	21	0.8	DIN 7603	100	000000000	0000
	M18	18	22	0.8	DIN 7603	100	000000000	0000
	M18	18	24	0.8	DIN 7603	100	000000000	0000
	M22	22	27	0.8	DIN 7603	100	000000000	0000

Bearing Spring Lock Washers for Slotted Bearing Nuts


	For Stepped Nuts

Designed for use with bearing nuts, these lock washers have a conical shape that presses like a spring against bearings, bushings, gears, and pulleys to hold them in place on your threaded shaft or spindle. They also have an inner tab that sits in the shaft or spindle’s keyway to prevent the nut from loosening.

Steel—Steel washers are strong and flexible.

DIN 462—DIN 462 and DIN 5406 washers meet international standards for lock washer dimensions. Pair DIN 462 washers with DIN 1804 bearing nuts, and DIN 5406 washers with DIN 981 bearing nuts.

					Tab, mm
	For Screw Size	ID, mm	OD, mm	Thk., mm	Wd.	Dp.	Overall Ht., mm	Hardness	Specs. Met	For Bearing Nut Specs. Met		Each
For Stepped Nuts







				Steel

				M8	8.000	20.000	0.800	3.000	2.000	2.500	Not Rated	DIN 462	DIN 1804	000000000	00000


				M10	10.000	25.000	0.800	4.000	2.500	3.000	Not Rated	DIN 462	DIN 1804	000000000	0000
				M12	12.000	28.000	0.800	5.000	2.500	3.000	Not Rated	DIN 462	DIN 1804	000000000	0000
				M14	14.000	30.000	0.800	5.000	2.500	3.000	Not Rated	DIN 462	DIN 1804	000000000	0000
				M15	15.000	30.000	0.800	5.000	2.500	3.000	Not Rated	—	—	000000000	0000

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, mm	OD, mm	Thk., mm	Type	Thk., mm	Min.	Max.	Specs. Met	Pkg. Qty.		Pkg.
Highly Corrosion-Resistant 316 Stainless Steel



		M3	3.2	8.0	0.8	Acrylic	0.25	50	200	DIN 125	5	000000000	00000


		M4	4.3	9.0	0.8	Acrylic	0.25	50	200	DIN 125	5	000000000	0000

Tab Lock Washers

1 Tab

Instead of relying on friction, these washers lock mechanically for more holding power than split and tooth lock washers. Bend the tabs with a wrench to stop both the fastener and washer from rotating. They are often used in applications with moderate vibration, such as motors, mixers, and pumps. These washers are not reusable because the tabs will weaken if you bend them repeatedly.

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.

1 Tab—Bend the tab down over the edge of your mounting surface, and bend the side of the washer up against the nut or screw.

	ID, mm	OD, mm	Thk., mm	No. of Tabs	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M8	8.4	22.0	0.8	1	DIN 93	25	000000000	000000


	M10	10.5	26.0	0.8	1	DIN 93	25	000000000	00000

Plastic Washers

All of these washers are lightweight, nonconductive, and naturally rust resistant. They are commonly used in electronics and automation applications to take the pressure off screws and nuts and protect mounting surfaces.

High-Strength Glass-Filled Nylon—Stronger than plain nylon, but not quite as strong as PEEK. These washers will swell and weaken when exposed to moisture, so they are best for dry environments.

					Temp. Range
	For Screw Size	ID, mm	OD, mm	Thk., mm	Min.	Max., ° F	Color	Pkg. Qty.		Pkg.
High-Strength Glass-Filled Nylon



		M4	4.3	9	0.8	Not Rated	220	Black	10	000000000	00000


		M4	4.3	9	0.8	Not Rated	220	White	10	000000000	0000

Curved Spring Lock Washers

The curvy, spring-like shape adds a small amount of tension to prevent nuts and screws from backing out due to mild vibration. These washers also flex slightly to compensate for uneven surfaces. While more secure than a standard flat washer, these have the least amount of gripping power of all our lock washers. They are best suited for electrical panels, light fixtures, and other light duty assemblies. These washers hold their shape when untightened, so you can reuse them a handful of times without losing strength.

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.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

Steel—Best for dry environments since moisture will cause these washers to rust.

	ID, mm	OD, mm	Thk., mm	Overall Ht., mm	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M10	10.5	18.0	0.8	4.0	DIN 137A	50	000000000	00000


	Highly Corrosion-Resistant 316 Stainless Steel



			M10	10.5	18.0	0.8	4.0	DIN 137A	50	000000000	00000


			Zinc-Plated Steel



					M10	10.5	18.0	0.8	4.0	DIN 137A	100	000000000	00000


					Steel



							M4	3.6	7.0	0.8	1.4	DIN 6905	200	000000000	00000

Heavy-Vibration-Resistant Spring Lock Washers

With a grip that's second only to wedge lock, these washers stop nuts and screws from wiggling loose under constant, vigorous vibration. They are ideal for engines, turbines, generators, and other heavy duty equipment. Similar to a spring, they flatten under pressure to add tension between mating surfaces. As long as the washers aren't deformed or otherwise damaged, you can reuse them indefinitely without losing locking strength. Also known as conical washers and Belleville washers.

Stack multiple washers in the same direction to double or triple how much weight they can bear. Stack washers in opposite directions for better deflection, which means they compress further and withstand more shock and movement without loosening.

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.

High-Strength 17-7 PH Stainless Steel—The strongest stainless steel washers we offer, these are comparable to high-strength Grade 8 steel. They won’t rust in wet and outdoor environments, but they can’t handle the harsh chemicals that 316 stainless steel can.

Steel—Best for dry environments since moisture will cause these washers to rust.

DIN 432—These washers have a small tab that presses up against the flats of your nut or screw for extra security.

	ID, mm	OD, mm	Thk., mm	Overall Ht., mm	Specs. Met	Pkg. Qty.		Pkg.
Highly Corrosion-Resistant 316 Stainless Steel



	M5	5.3	17.0	0.8	2.5	DIN 432	25	000000000	000000


	M6	6.4	19.0	0.8	3.0	DIN 432	25	000000000	00000


	High-Strength 17-7 PH Stainless Steel



			M5	5.2	11.9	0.8	1.4	—	5	000000000	0000


			Steel



					M5	5.3	17.0	0.8	2.5	DIN 432	10	000000000	00000


					M6	6.4	19.0	0.8	3.0	DIN 432	5	000000000	0000

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.

Black-Oxide Steel—Typically chosen for their appearance, these washers have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

Highly Corrosion-Resistant Phosphor Bronze—Stronger and more wear resistant than silicon bronze, but with the same excellent corrosion resistance. These washers won't rust or deteriorate when submerged in salt water, so they're a good fit for marine environments.

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



	M8	1	8.4	15.0	0.8	3.0	DIN 137B	50	000000000	00000


	Black-Oxide Steel



			M7	1	7.4	14.0	0.8	3.0	DIN 137B	100	000000000	00000


			M8	1	8.4	15.0	0.8	3.0	DIN 137B	100	000000000	00000


			Highly Corrosion-Resistant Phosphor Bronze



					M8	1	8.4	15.0	0.8	3.0	DIN 137B	5	000000000	0000