DIN 7603 Washers | McMaster-Carr

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108 Products

Performance

Oil Resistant

Best for lubricated equipment, such as engines and generators

90 products

Weather Resistant

Withstand long-term exposure to sunlight, rain, and ozone

90 products

Performance

Corrosion Resistant

Won't rust in wet and outdoor environments

90 products

Reusable

Switch between assemblies without losing sealing power

18 products

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.

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.

	For Screw Size	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Copper



		M5	5.200	10.400	0.8 to 1.2	DIN 7603	25	97725A510	000000


		M6	6.200	9.900	0.8 to 1.2	DIN 7603	25	97725A100	00000
		M6	6.200	11.900	0.8 to 1.2	DIN 7603	25	97725A114	00000
		M6	6.200	12.400	1.3 to 1.7	DIN 7603	25	97725A520	00000
		M8	8.200	11.900	0.8 to 1.2	DIN 7603	25	97725A150	00000
		M8	8.200	12.400	1.3 to 1.7	DIN 7603	25	97725A530	00000
		M8	8.200	13.900	0.8 to 1.2	DIN 7603	25	97725A115	00000
		M10	10.200	13.900	0.8 to 1.2	DIN 7603	25	97725A200	00000
		M10	10.200	13.900	1.3 to 1.7	DIN 7603	10	97725A211	0000
		M10	10.200	15.900	1.3 to 1.7	DIN 7603	25	97725A540	00000
		M12	12.200	15.900	1.3 to 1.7	DIN 7603	25	97725A250	00000


		M12	12.200	16.200	0.8 to 1.2	DIN 7603	25	97725A550	00000
		M12	12.200	17.900	1.3 to 1.7	DIN 7603	25	97725A116	00000
		M13	13.200	17.900	1.3 to 1.7	DIN 7603	25	97725A131	00000
		M14	14.200	17.900	0.8 to 1.2	DIN 7603	10	97725A560	00000
		M14	14.200	17.900	1.3 to 1.7	DIN 7603	10	97725A117	00000
		M14	14.200	19.900	1.3 to 1.7	DIN 7603	10	97725A118	00000
		M16	16.200	19.900	1.3 to 1.7	DIN 7603	10	97725A350	00000
		M16	16.200	21.900	1.3 to 1.7	DIN 7603	10	97725A119	00000
		M16	16.200	21.900	1.8 to 2.2	DIN 7603	10	97725A570	00000
		M17	17.200	21.900	1.3 to 1.7	DIN 7603	10	97725A132	0000


		M18	18.200	21.900	1.3 to 1.7	DIN 7603	5	97725A212	0000
		M18	18.200	23.900	1.3 to 1.7	DIN 7603	10	97725A450	00000
		M20	20.200	23.900	1.3 to 1.7	DIN 7603	5	97725A213	0000
		M20	20.200	25.900	1.3 to 1.7	DIN 7603	5	97725A122	00000
		M21	21.200	25.900	1.3 to 1.7	DIN 7603	10	97725A133	00000
		M22	22.200	26.900	1.3 to 1.7	DIN 7603	5	97725A500	00000
		M22	22.200	28.900	1.3 to 1.7	DIN 7603	5	97725A123	00000
		M24	24.300	29.900	1.8 to 2.2	DIN 7603	5	97725A124	00000
		M26	26.300	31.900	1.8 to 2.2	DIN 7603	5	97725A125	00000
		M27	27.300	31.900	1.8 to 2.2	DIN 7603	10	97725A134	00000


		M28	28.300	35.900	1.3 to 1.7	DIN 7603	5	97725A580	00000
		M30	30.300	35.900	1.8 to 2.2	DIN 7603	5	97725A126	00000
		M32	32.300	37.900	1.8 to 2.2	DIN 7603	5	97725A127	00000
		M33	33.300	38.900	1.8 to 2.2	DIN 7603	5	97725A135	00000
		M36	36.300	41.900	1.8 to 2.2	DIN 7603	5	97725A590	00000
		M36	36.300	43.900	1.8 to 2.2	DIN 7603	1	97725A610	00000
		M38	38.300	43.900	1.8 to 2.2	DIN 7603	1	97725A620	00000
		M42	42.300	48.900	1.8 to 2.2	DIN 7603	1	97725A630	00000
		M48	48.300	54.900	1.8 to 2.2	DIN 7603	1	97725A640	00000


		Cellulose-Filled Copper



				M6	6.200	9.900	1.3 to 1.7	DIN 7603	25	97725A301	00000


				M8	8.200	11.900	1.3 to 1.7	DIN 7603	25	97725A302	00000
				M8	8.200	13.900	1.3 to 1.7	DIN 7603	25	97725A303	00000
				M10	10.200	13.900	1.3 to 1.7	DIN 7603	25	97725A304	00000
				M10	10.200	15.900	1.3 to 1.7	DIN 7603	25	97725A305	00000
M12				12.200	15.900	1.8 to 2.2	DIN 7603	25	97725A306	00000
M12	12.200			17.900	1.8 to 2.2	DIN 7603	25	97725A307	00000
M14	14.200			17.900	1.8 to 2.2	DIN 7603	10	97725A308	00000
M14	14.200			19.900	1.8 to 2.2	DIN 7603	10	97725A309	00000
M16	16.200			19.900	1.8 to 2.2	DIN 7603	10	97725A311	00000
M18	18.200			23.900	1.8 to 2.2	DIN 7603	10	97725A312	00000


M20	20.200			23.900	1.8 to 2.2	DIN 7603	10	97725A313	00000
M20	20.200			25.900	1.8 to 2.2	DIN 7603	10	97725A314	00000
M22	22.200			26.900	1.8 to 2.2	DIN 7603	10	97725A315	00000
M24	24.300			31.900	2.3 to 2.7	DIN 7603	10	97725A316	00000
M26	26.300			30.900	2.3 to 2.7	DIN 7603	10	97725A317	00000
M26	26.300			31.900	2.3 to 2.7	DIN 7603	10	97725A318	00000
M26	26.300			33.900	2.3 to 2.7	DIN 7603	10	97725A319	00000
M28	28.300			33.900	2.3 to 2.7	DIN 7603	5	97725A321	00000
M30	30.300			35.900	2.3 to 2.7	DIN 7603	5	97725A322	00000
M32	32.300			37.900	2.3 to 2.7	DIN 7603	5	97725A323	00000


M36	36.300			41.900	2.3 to 2.7	DIN 7603	5	97725A324	00000
M38	38.300			43.900	2.3 to 2.7	DIN 7603	5	97725A325	00000
M42	42.300			48.900	2.3 to 2.7	DIN 7603	1	97725A326	00000
M48	48.300			54.900	2.3 to 2.7	DIN 7603	1	97725A327	00000
M50	50.200			56.900	2.3 to 2.7	DIN 7603	1	97725A328	00000


Aluminum



				M6	6.200	9.900	0.8 to 1.2	DIN 7603	50	97725A600	00000


				M6	6.200	11.900	0.8 to 1.2	DIN 7603	50	97725A102	00000
				M8	8.200	11.900	0.8 to 1.2	DIN 7603	50	97725A700	00000
				M8	8.200	13.900	0.8 to 1.2	DIN 7603	10	97725A214	0000
				M10	10.200	13.900	0.8 to 1.2	DIN 7603	50	97725A750	00000
				M10	10.200	13.900	1.3 to 1.7	DIN 7603	10	97725A215	0000
				M10	10.200	15.900	0.8 to 1.2	DIN 7603	50	97725A103	00000
				M10	10.200	15.900	1.3 to 1.7	DIN 7603	10	97725A216	0000
				M12	12.200	15.900	1.3 to 1.7	DIN 7603	50	97725A800	00000
				M12	12.200	17.900	1.3 to 1.7	DIN 7603	50	97725A104	00000
				M14	14.200	17.900	1.3 to 1.7	DIN 7603	25	97725A105	00000


				M14	14.200	19.900	1.3 to 1.7	DIN 7603	25	97725A106	00000
				M16	16.200	19.900	1.3 to 1.7	DIN 7603	25	97725A850	00000
				M16	16.200	21.900	1.3 to 1.7	DIN 7603	10	97725A107	00000
				M18	18.200	21.900	1.3 to 1.7	DIN 7603	5	97725A217	0000
				M18	18.200	23.900	1.3 to 1.7	DIN 7603	10	97725A860	00000
				M20	20.200	23.900	1.3 to 1.7	DIN 7603	5	97725A218	0000
				M20	20.200	25.900	1.3 to 1.7	DIN 7603	10	97725A109	00000
				M22	22.200	26.900	1.3 to 1.7	DIN 7603	10	97725A950	00000
				M24	24.300	29.900	1.8 to 2.2	DIN 7603	10	97725A112	00000
		M24		24.300	31.900	1.8 to 2.2	DIN 7603	5	97725A219	0000


		M26	26.300	31.900	1.8 to 2.2	DIN 7603	10	97725A113	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



	M5	5	8	0.8	DIN 7603	100	90449A110	00000


	M5	5	10	0.8	DIN 7603	100	90449A120	0000
	M6	6	9	0.8	DIN 7603	100	90449A130	0000
	M6	6	10	0.8	DIN 7603	100	90449A140	0000
	M8	8	12	0.8	DIN 7603	100	90449A150	0000
	M8	8	14	0.8	DIN 7603	100	90449A160	0000
	M10	10	14	0.8	DIN 7603	100	90449A170	0000
	M10	10	16	1	DIN 7603	100	90449A180	0000
	M12	12	16	0.8	DIN 7603	100	90449A190	0000
	M12	12	18	1	DIN 7603	100	90449A210	0000
	M12	12	20	0.8	DIN 7603	100	90449A220	0000


	M12	12	24	0.8	DIN 7603	100	90449A230	0000
	M14	14	18	1	DIN 7603	100	90449A240	0000
	M14	14	24	0.8	DIN 7603	100	90449A250	0000
	M16	16	21	0.8	DIN 7603	100	90449A260	0000
	M18	18	22	0.8	DIN 7603	100	90449A270	0000
	M18	18	24	0.8	DIN 7603	100	90449A280	0000
	M22	22	27	0.8	DIN 7603	100	90449A290	0000

Sealing Washer Assortments

Keep a collection of metal sealing washers on hand to prevent leaks while distributing weight evenly under nuts and screws. Also known as crush washers, these deform when tightened to lock air and fluid in, while keeping dust and contaminants out. They are not reusable.

Labels in the lid include our part numbers, so it's easy to replenish the assortments.

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.

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

	Sizes Included	Specs. Met	Container Type		Each
Copper



	555	For M5 to M42 Screw Sizes	DIN 7603	Plastic Box	92486A110	0000000


	Aluminum



			570	For M6 to M30 Screw Sizes	DIN 7603	Plastic Box	92486A120	000000