M18 Spacers | McMaster-Carr

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71 Products

Oversized Washers

These washers have exaggerated diameters to cover large holes and to compensate for uneven mounting surfaces. They are also thicker than general purpose washers, so they bridge wide gaps when used as spacers.

Stainless Steel About Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these washers resist rust. However, they won'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 resist rust in wet and outdoor environments, but won't hold up to harsh chemicals as well as 316 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.

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



	M18	19.0	44.0	7.0 to 9.0	DIN 7349	10	000000000	000000


	M18	20.0	56.0	3.4 to 4.6	DIN 9021	1	000000000	0000


	Black-Oxide 18-8 Stainless Steel



			M18	20.0	56.0	3.4 to 4.6	DIN 9021	1	000000000	0000


			Highly-Corrosion-Resistant 316 Stainless Steel



					M18	20.0	56.0	3.4 to 4.6	DIN 9021	1	000000000	0000

Steel

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

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.

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

	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M18	19.0	44.0	7.0 to 9.0	DIN 7349	5	000000000	000000


	M18	20.0	56.0	3.4 to 4.6	DIN 9021	10	000000000	00000


	Black-Oxide Steel



			M18	19.0	44.0	7.0 to 9.0	DIN 7349	1	000000000	0000


			Steel



					M18	18.0	30.0	3.7 to 4.3	DIN 1440, ISO 8738	10	000000000	0000

General Purpose Washers

Your go-to metal washer for every screw size. Washers take the pressure off nuts and screws to protect mounting surfaces.

Stainless Steel About Stainless Steel

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

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.

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



	M18	19.0	34.0	2.7 to 3.3	DIN 125, ISO 7089	10	000000000	00000


	Highly-Corrosion-Resistant 316 Stainless Steel



			M18	19.0	34.0	2.7 to 3.3	DIN 125, ISO 7089	10	000000000	0000

Steel

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

Zinc-Yellow-Chromate-Plated Steel—With the same corrosion resistance as zinc-plated steel, these withstand occasional exposure to moisture.

Highly-Corrosion-Resistant Zinc-Flake-Coated Steel—With 40 times the corrosion resistance of zinc-plated steel, these withstand rust as well as 316 stainless steel. They have been tested to extreme standards, including 1,000 hours of salt spray. They are similar to Magni-coated washers.

Black Super-Corrosion-Resistant-Coated Steel—Combines a finished appearance with the rust resistance of 316 stainless steel. The coating has been tested to extreme standards, including 1,000 hours of salt spray resistance, to hold up in wet and outdoor environments. Also known as black luster.

For Fastener Strength Grade/Class—If you require screws or nuts with a specific fastener strength rating, make sure your washer matches the grade or class.

	ID, mm	OD, mm	Thk., mm	For Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M18	19.0	34.0	2.7 to 3.3	—	DIN 125, ISO 7089	50	000000000	000000


	M18	19.0	34.0	2.7 to 3.3	ISO Class 8.8	DIN 125, ISO 7089	25	000000000	00000
	M18	19.0	34.0	2.7 to 3.3	ISO Class 10.9	DIN 125, ISO 7089	5	000000000	0000


	Zinc-Yellow-Chromate-Plated Steel



			M18	19.0	34.0	2.7 to 3.3	ISO Class 10.9	DIN 125, ISO 7089	5	000000000	0000


			Black-Oxide Steel



					M18	19.0	34.0	2.7 to 3.3	—	DIN 125	10	000000000	00000


					Highly-Corrosion-Resistant Zinc-Flake-Coated Steel



							M18	19.0	34.0	2.7 to 3.3	ISO Class 8.8	DIN 125, ISO 7089	5	000000000	00000


							Black Super-Corrosion-Resistant-Coated Steel



									M18	19.0	34.0	2.7 to 3.3	—	DIN 125, ISO 7089	5	000000000	0000

Aluminum

One-third the weight of steel, these washers are commonly used in robotics, automation, and other applications that have weight limits. They're an alternative to stainless steel for rust resistance, but aren't as strong.

	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Aluminum



	M18	19.0	34.0	2.7 to 3.3	DIN 125, ISO 7089	5	000000000	000000

Brass

Softer than most metals, brass washers won't damage other fastening components.

Brass—With a warm, polished look, these washers are often chosen for their appearance. Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments.

	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Brass



	M18	19.0	34.0	2.7 to 3.3	DIN 125, ISO 7089	1	000000000	00000

Copper

These have the best conductivity of all our metal washers. They're often used to secure electrical connections inside breaker panels and to fasten components on printed circuit boards. They're also the softest of all our metal washers, so they won't damage screws and nuts. However, copper washers aren't as corrosion resistant as brass washers, and will develop a green patina over time.

	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Copper



	M18	19.0	34.0	2.7 to 3.3	DIN 125, ISO 7089	1	000000000	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.

Rubber

Resist leaks better than metal sealing washers, but are more susceptible to wear and tear. Reuse these washers a handful of times, as long as the material isn't damaged.

Neoprene—If you're not sure which material best suits your needs, these versatile washers are a great solution. They offer a good balance of strength and flexibility to hold a tight seal, even in wet and outdoor conditions. These washers also withstand salt water and mild chemicals, such as detergents. However, they don't resist oil, grease, or fuel as well as Buna-N washers.

Weather-Resistant EPDM—The best choice for outdoor use, these washers withstand long-term exposure to sunlight, rain, and ozone. However, they can't handle oil, grease, or fuel like Buna-N washers can.

Weather- and Chemical-Resistant Santoprene—Not only will these washers withstand sunlight, rain, and ozone, they also won't degrade when exposed to acids and other harsh chemicals. They are more wear resistant than EPDM washers to stand up to repeated use.

High-Temperature Silicone—Withstand the widest temperature range of all our rubber washers. They resist detergents but will break down when exposed to oil, grease, and fuel.

High-Temperature Chemical-Resistant Fluorosilicone—These washers handle a similar temperature range as silicone and are nearly as chemical resistant as fluoroelastomer. Commonly used in the aerospace industry, they withstand oil, grease, and fuel.

					Temp. Range, ° F
	For Screw Size	ID, mm	OD, mm	Thk., mm	Min.	Max.	Color	Food Industry Std.	Pkg. Qty.		Pkg.
Neoprene



		M18	19.000	34.000	1.168 to 1.981	-30	220	White	FDA Compliant 21 CFR 177.2600	10	000000000	000000


		Weather-Resistant EPDM



				M18	19.000	34.000	1.190 to 1.950	-50	300	White	FDA Compliant 21 CFR 177.2600	25	000000000	00000


				Weather- and Chemical-Resistant Santoprene



						M18	19.000	34.000	1.600 to 2.360	-40	270	Black	—	10	000000000	0000


						High-Temperature Silicone



								M18	19.000	34.000	1.320 to 1.820	-80	450	Red	FDA Compliant 21 CFR 177.2600	5	000000000	0000


								High-Temperature Chemical-Resistant Fluorosilicone



										M18	19.000	34.000	1.320 to 1.820	-80	450	Blue	—	1	000000000	0000

Metal

Also known as crush washers, these are made of soft metal that deforms under pressure to fill gaps around the nut or screw. Often found in oil drain valves, they withstand stress and wear better than plastic and rubber washers, but aren't as leak-resistant. Metal sealing washers are not reusable.

Copper—Softer than aluminum washers, these deform easily to create a tight seal with less effort. They resist rusting in corrosive environments, but will develop a green patina over time.

Cellulose-Filled Copper—The easiest washers to crush. These washers are embedded with cellulose, which makes them more flexible than other metal washers for a tighter seal. They resist rusting in corrosive environments, but will develop a green patina over time.

Aluminum—These washers are an economical alternative to copper. They have similar corrosion resistance but require more effort to crush.

	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Copper



	M18	18.200	21.900	1.3 to 1.7	DIN 7603	5	000000000	00000


	M18	18.200	23.900	1.3 to 1.7	DIN 7603	10	000000000	00000


	Cellulose-Filled Copper



			M18	18.200	23.900	1.8 to 2.2	DIN 7603	10	000000000	00000


			Aluminum



					M18	18.200	21.900	1.3 to 1.7	DIN 7603	5	000000000	0000


					M18	18.200	23.900	1.3 to 1.7	DIN 7603	10	000000000	00000

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



	M18	18	22	0.8	DIN 7603	100	000000000	00000


	M18	18	24	0.8	DIN 7603	100	000000000	0000

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.

Low-Friction Lubricant-Filled Nylon—Reduce friction between the washer, fastener, and mounting surface to prevent sticking when tightening and loosening.

Moisture-Resistant Delrin® Acetal—The best plastic for damp and wet environments, these washers won't swell or lose their strength if exposed to moisture.

Low-Friction Impact-Resistant UHMW Polyethylene—The slippery surface reduces friction between the washer, fastener, and mounting surface to prevent sticking when fastening and loosening. These washers also resist bumps and vibration without cracking or denting.

Acid-Resistant PVC—A great choice for chemical-processing lines, these washers won't degrade when exposed to harsh acids, alkalis, and alcohols. They are also good electrical insulators.

Chemical-Resistant Polypropylene—These versatile washers resist a broad range of chemicals, such as petroleum, degreasers, and methyl ethyl ketone (MEK). They will weaken, however, if exposed to chlorine, lacquer solvents, or nitric acid.

Chemical-Resistant High-Temperature PTFE—The most chemical-resistant plastic washers we offer, these stand up to the widest range of harsh acids, bases, solvents, and corrosive cleaners, even at temperatures up to 500° F. Their slippery surface reduces friction between the washer, fastener, and mounting surface to prevent sticking when tightening and loosening. They are also good electrical insulators.

High-Strength High-Temperature PEEK—These washers bear heavier loads than most other plastic washers. In addition, they won't melt or deform when exposed to high temperatures up to 550° F. PEEK washers aren't very impact resistant, however, so they may crack or dent if subjected to hard bumps and vibrations.

					Temp. Range, ° F
	For Screw Size	ID, mm	OD, mm	Thk., mm	Min.	Max.	Specs. Met	Color	Pkg. Qty.		Pkg.
Low-Friction Lubricant-Filled Nylon



		M18	19.0	34.0	2.7 to 3.3	Not Rated	220	DIN 125	Gray	5	000000000	00000


		Moisture-Resistant Delrin® Acetal



				M18	19.1	33.7	2.7 to 3.3	Not Rated	180	—	White	5	000000000	00000


				Low-Friction Impact-Resistant UHMW Polyethylene



						M18	19.0	34.0	2.8 to 3.5	Not Rated	180	—	Off-White	1	000000000	0000


						Acid-Resistant PVC



								M18	19.0	34.0	2.8 to 3.5	Not Rated	140	—	Gray	5	000000000	0000


								Chemical-Resistant Polypropylene



										M18	19	34	3.0 to 3.3	Not Rated	150	—	Off-White	5	000000000	0000


										Chemical-Resistant High-Temperature PTFE



												M18	19.0	34.0	2.7 to 3.3	Not Rated	500	—	White	5	000000000	00000


												High-Strength High-Temperature PEEK



														M18	19.0	34.0	2.7 to 3.3	-20	500	DIN 125	Beige	1	000000000	0000

Undersized Washers

These washers distribute pressure evenly under fasteners with narrow heads, such as cheese and socket head screws. They have smaller diameters than general purpose washers of the same screw size.

Stainless Steel About Stainless Steel

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

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



	M18	19.0	30.0	2.3 to 2.7	DIN 433	1	000000000	00000

Steel

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

	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M18	19.0	30.0	2.3 to 2.7	DIN 433, ISO 7092	25	000000000	000000

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

				M18	18.000	34.000	1.000	5.000	2.500	4.000	Not Rated	DIN 462	DIN 1804	000000000	00000

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.

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.

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

DIN 128A—These washers have split ends that bite into your material surface for a tighter hold than other curved washers.

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



	M18	18.2	29.4	2.7	4.5	DIN 128A	10	000000000	000000


	Zinc-Plated Steel



			M18	18.2	29.4	2.7	4.5	DIN 128A	10	000000000	0000

Extreme-Vibration-Resistant Wedge Lock Washers

When it's critical to keep bolted assemblies secure, choose these two-piece lock washers with the tightest grip of all. They stop nuts and screws from loosening in heavy machinery that experiences jarring starts and stops, such as compressors and compactors. Serrations on the outside bite into the fastener and mating surfaces, while wedges on the inside lock the two pieces together. When the nut or screw starts to loosen, the wedges drive more tightly together to maintain tension. You can reuse these washers up to fifteen times, as long as the serrations and wedges are not worn down. They are comparable to NORD-LOCK® or Sherex TEC® washers.

Wedge Lock

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.

	ID	OD	Thk.	Pkg. Qty.		Pkg.
Highly-Corrosion-Resistant 316 Stainless Steel



	M18	0.770"	1.140"	0.120" to 0.140"	1	000000000	000000


	M18	0.770"	1.360"	0.120" to 0.140"	1	000000000	00000


	Highly-Corrosion-Resistant Zinc-Flake-Coated Steel



			M18	0.770"	1.140"	0.120" to 0.140"	4	000000000	00000


			M18	0.770"	1.360"	0.120" to 0.140"	2	000000000	00000

Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Stop socket head screws from wiggling loose on equipment with constant, vigorous vibration, such as engines, turbines, and generators. These washers have a small diameter to fit under screws with narrow heads. 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.

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.

Top-and-Bottom Serration—Adds friction for extra gripping power.

	ID	OD	Thk.	Overall Ht.	Serration Location	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M18	0.748"	1.063"	0.059"	0.091"	Top and Bottom	1	000000000	00000


	Zinc-Plated Steel



			M18	0.748"	1.063"	0.055"	0.091"	Top and Bottom	10	000000000	00000


			Steel



					M18	0.748"	1.063"	0.059"	0.091"	Top and Bottom	10	000000000	0000

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.

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

Phosphate-Coated Steel—Paint adheres evenly to the surface of these washers, so you can add your own decorative finish. They are more durable than zinc-plated steel washers to withstand wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.

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



	M18	19.0	42.0	4.5	5.8	DIN 6796	1	000000000	000000


	Zinc-Plated Steel



			M18	19.0	42.0	4.5	5.8	DIN 6796	1	000000000	00000


			Phosphate-Coated Steel



					M18	19.0	42.0	4.5	5.8	DIN 6796	2	000000000	00000


					Steel



							M18	19.0	42.0	4.5	5.8	DIN 6796	1	000000000	0000

Tooth Lock Washers

Grip tighter than split lock washers to prevent nuts and screws from loosening in applications with constant movement, such as conveyors. Tooth lock washers typically can't be reused because the teeth often get bent when tightened.

External Tooth

Teeth on the outside edge bite into both the fastener and the mating surface for a stronger hold than internal-tooth lock washers. However, they may mar your material and snag on objects. Pair these washers with nuts and screws that are large enough to make contact with the teeth, such as pan, button, and binding head screws.

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

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



	M18	19.0	30.0	1.2 to 1.6	DIN 6797	10	000000000	00000


	Zinc-Plated Steel



			M18	19.0	30.0	1.2 to 1.6	DIN 6797	5	000000000	0000

Internal Tooth

Internal teeth dig into the nut or screw to prevent it from backing out. Unlike external-tooth lock washers, these have a smooth outside edge, so they are less likely to mar your material or snag on objects. However, they don’t grip quite as well. Pair them with fasteners that have small diameters, such as fillister and cheese head screws.

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

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



	M18	19.0	30.0	1.2 to 1.5	DIN 6797	10	000000000	00000


	Zinc-Plated Steel



			M18	19.0	30.0	1.2 to 1.5	DIN 6797	10	000000000	0000


			Black-Oxide Steel



					M18	19.0	30.0	1.2 to 1.5	DIN 6797	10	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.

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

DIN 128B—These washers have split ends that bite into your material surface for a tighter hold than other wave washers.

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



	M18	1	19.0	34.0	1.6	6.6	DIN 137B	10	000000000	000000


	Zinc-Plated Steel



			M18	1	18.2	29.4	2.7	4.5	DIN 128B	10	000000000	0000

Split Lock Washers for Socket Head Screws

Stop socket head screws from loosening due to mild vibration. These washers have a small diameter to fit under screws with narrow heads, but are still thick enough to keep fasteners secure. While they're not as vibration resistant as other lock washers, they are a great fit for electrical panels, light fixtures, and other light duty assemblies. Split lock washers are not reusable, and they only work with fasteners that have right-hand threads. Also known as high-collar lock washers.

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.

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



	M18	19.0	26.4	3.3 to 3.7	DIN 7980	10	000000000	00000


	Highly-Corrosion-Resistant 316 Stainless Steel



			M18	19.0	26.4	3.3 to 3.7	DIN 7980	10	000000000	0000


			Zinc-Plated Steel



					M18	19.0	26.4	3.3 to 3.7	DIN 7980	25	000000000	00000


					Black-Oxide Steel



							M18	19.0	26.4	3.3 to 3.7	DIN 7980	25	000000000	0000

Split Lock Washers

Stop nuts and screws from loosening due to mild vibration. As you tighten, the uneven ends bite into the nut or screw so it won't back out. While they're not as vibration resistant as other lock washers, they are a great fit for electrical panels, light fixtures, and other light duty assemblies. Split lock washers are not reusable, and they only work with fasteners that have right-hand threads.

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.

Zinc-Yellow-Chromate-Plated Steel—With the same corrosion resistance as zinc-plated steel, these withstand occasional exposure to moisture.

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

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



	M18	19.0	29.4	3.3 to 3.7	DIN 127B	10	000000000	00000


	Highly-Corrosion-Resistant 316 Stainless Steel



			M18	19.0	29.4	3.3 to 3.7	DIN 127B	10	000000000	0000


			Zinc-Plated Steel



					M18	19.0	29.4	3.3 to 3.7	DIN 127B	25	000000000	00000


					Zinc-Yellow-Chromate-Plated Steel



							M18	19.0	29.4	3.3 to 3.7	DIN 127B	25	000000000	00000


							Steel



									M18	19.0	29.4	3.3 to 3.7	DIN 127B	50	000000000	00000