Metric Class 10 Washers | McMaster-Carr

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Fastener Strength Grade/Class

ISO Class 10.9

Finish

Galvanized

Zinc Plated

Zinc Yellow-Chromate Plated

Material

Steel

System of Measurement

Screw Size

Washer Type

Fastener Strength Rating

Hardness

Specifications Met

Performance

Thickness

Washer Designation

RoHS

REACH

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Application

Tension Indicated

83 Products

Performance

Corrosion Resistant

Won't rust in wet and outdoor environments

8 products

High Strength

Withstand heavy loads and high stress without deforming

57 products

Performance

Tension Indicating

Change color when you apply the correct tension to prevent overtightening

7 products

Application

Structural

Support structural screws and nuts in columns, joists, and I-beams

15 products

General Purpose Washers

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

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.

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



	M2	2.2	5.0	0.3 to 0.4	ISO Class 10.9	DIN 125, ISO 7089	100	000000000	000000


	M2.5	2.7	6.0	0.5 to 0.6	ISO Class 10.9	DIN 125, ISO 7089	100	000000000	0000
	M3	3.2	7.0	0.5 to 0.6	ISO Class 10.9	DIN 125, ISO 7089	100	000000000	0000
	M4	4.3	9.0	0.7 to 0.9	ISO Class 10.9	DIN 125, ISO 7089	100	000000000	00000
	M5	5.3	10.0	0.9 to 1.1	ISO Class 10.9	DIN 125, ISO 7089	100	000000000	00000
	M6	6.4	12.0	1.4 to 1.8	ISO Class 10.9	DIN 125, ISO 7089	100	000000000	00000
	M8	8.4	16.0	1.4 to 1.8	ISO Class 10.9	DIN 125, ISO 7089	50	000000000	0000
	M10	10.5	20.0	1.8 to 2.2	ISO Class 10.9	DIN 125, ISO 7089	50	000000000	00000
	M12	13.0	24.0	2.3 to 2.7	ISO Class 10.9	DIN 125, ISO 7089	25	000000000	0000
	M14	15.0	28.0	2.3 to 2.7	ISO Class 10.9	DIN 125, ISO 7089	25	000000000	00000
	M16	17.0	30.0	2.7 to 3.3	ISO Class 10.9	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
	M20	21.0	37.0	2.7 to 3.3	ISO Class 10.9	DIN 125, ISO 7089	10	000000000	0000
	M22	23.0	39.0	2.7 to 3.3	ISO Class 10.9	DIN 125, ISO 7089	5	000000000	0000
	M24	25.0	44.0	3.7 to 4.3	ISO Class 10.9	DIN 125, ISO 7089	10	000000000	00000
	M30	31.0	56.0	3.7 to 4.3	ISO Class 10.9	DIN 125, ISO 7089	1	000000000	0000


	Zinc-Yellow-Chromate-Plated Steel



			M3	3.2	7.0	0.5 to 0.6	ISO Class 10.9	DIN 125, ISO 7089	100	000000000	0000


			M4	4.3	9.0	0.7 to 0.9	ISO Class 10.9	DIN 125, ISO 7089	100	000000000	00000
			M5	5.3	10.0	0.9 to 1.1	ISO Class 10.9	DIN 125, ISO 7089	100	000000000	00000
			M6	6.4	12.0	1.4 to 1.8	ISO Class 10.9	DIN 125, ISO 7089	50	000000000	00000
			M8	8.4	16.0	1.4 to 1.8	ISO Class 10.9	DIN 125, ISO 7089	25	000000000	0000
			M10	10.5	20.0	1.8 to 2.2	ISO Class 10.9	DIN 125, ISO 7089	25	000000000	00000
			M12	13.0	24.0	2.3 to 2.7	ISO Class 10.9	DIN 125, ISO 7089	10	000000000	0000
			M14	15.0	28.0	2.3 to 2.7	ISO Class 10.9	DIN 125, ISO 7089	10	000000000	0000
			M16	17.0	30.0	2.7 to 3.3	ISO Class 10.9	DIN 125, ISO 7089	5	000000000	0000
			M18	19.0	34.0	2.7 to 3.3	ISO Class 10.9	DIN 125, ISO 7089	5	000000000	0000
			M20	21.0	37.0	2.7 to 3.3	ISO Class 10.9	DIN 125, ISO 7089	5	000000000	0000


			M22	23.0	39.0	2.7 to 3.3	ISO Class 10.9	DIN 125, ISO 7089	5	000000000	0000
			M24	25.0	44.0	3.7 to 4.3	ISO Class 10.9	DIN 125, ISO 7089	1	000000000	0000
			M30	31.0	56.0	3.7 to 4.3	ISO Class 10.9	DIN 125, ISO 7089	1	000000000	0000

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.

Steel

Image of Product. Front orientation. Washers. Oversized Washers.

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.

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



	M6	6.5	16.7	2.7 to 3.3	ISO Class 10.9	DIN 7349	10	000000000	00000


	M6	6.5	17.7	1.4 to 1.8	ISO Class 10.9	DIN 9021	25	000000000	00000
	M8	8.5	20.7	3.7 to 4.3	ISO Class 10.9	DIN 7349	10	000000000	00000
	M8	8.5	23.7	1.8 to 2.2	ISO Class 10.9	DIN 9021	10	000000000	0000
	M10	10.6	24.7	3.7 to 4.3	ISO Class 10.9	DIN 7349	5	000000000	00000
	M10	10.6	29.7	2.3 to 2.7	ISO Class 10.9	DIN 9021	5	000000000	00000
	M12	13.1	36.6	2.7 to 3.3	ISO Class 10.9	DIN 9021	5	000000000	00000
	M14	15.1	43.6	2.7 to 3.3	ISO Class 10.9	DIN 9021	1	000000000	0000
	M16	17.1	49.6	2.7 to 3.3	ISO Class 10.9	DIN 9021	1	000000000	0000
	M20	22.2	58.5	3.4 to 4.6	ISO Class 10.9	DIN 9021	1	000000000	00000


	Zinc-Yellow-Chromate-Plated Steel



			M6	6.5	16.7	2.7 to 3.3	ISO Class 10.9	DIN 7349	10	000000000	0000


			M6	6.5	17.7	1.4 to 1.8	ISO Class 10.9	DIN 9021	25	000000000	00000
			M8	8.5	20.7	3.7 to 4.3	ISO Class 10.9	DIN 7349	10	000000000	00000
			M8	8.5	23.7	1.8 to 2.2	ISO Class 10.9	DIN 9021	10	000000000	0000
			M10	10.6	24.7	3.7 to 4.3	ISO Class 10.9	DIN 7349	5	000000000	00000
			M10	10.6	29.7	2.3 to 2.7	ISO Class 10.9	DIN 9021	5	000000000	00000
			M12	13.1	36.6	2.7 to 3.3	ISO Class 10.9	DIN 9021	5	000000000	00000
			M16	17.1	49.6	2.7 to 3.3	ISO Class 10.9	DIN 9021	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.

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.

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



	M3	3.2	6.0	0.5 to 0.6	ISO Class 10.9	DIN 433	100	000000000	00000


	M4	4.3	8.0	0.5 to 0.6	ISO Class 10.9	DIN 433	100	000000000	00000
	M5	5.3	9.0	0.9 to 1.1	ISO Class 10.9	DIN 433	100	000000000	00000
	M6	6.4	11.0	1.4 to 1.8	ISO Class 10.9	DIN 433	50	000000000	00000
	M8	8.4	15.0	1.4 to 1.8	ISO Class 10.9	DIN 433	25	000000000	0000
	M10	10.5	18.0	1.4 to 1.8	ISO Class 10.9	DIN 433	25	000000000	0000
	M12	13.0	20.0	1.8 to 2.2	ISO Class 10.9	DIN 433	25	000000000	00000
	M14	15.0	24.0	2.3 to 2.7	ISO Class 10.9	DIN 433	10	000000000	00000
	M16	17.0	28.0	2.3 to 2.7	ISO Class 10.9	DIN 433	10	000000000	0000
	M20	21.0	34.0	2.7 to 3.3	ISO Class 10.9	DIN 433	5	000000000	0000
	M24	25.0	39.0	3.7 to 4.3	ISO Class 10.9	DIN 433	1	000000000	0000


	Zinc-Yellow-Chromate-Plated Steel



			M4	4.3	8.0	0.5 to 0.6	ISO Class 10.9	DIN 433	100	000000000	00000


			M5	5.3	9.0	0.9 to 1.1	ISO Class 10.9	DIN 433	100	000000000	00000
			M6	6.4	11.0	1.4 to 1.8	ISO Class 10.9	DIN 433	50	000000000	00000
			M8	8.4	15.0	1.4 to 1.8	ISO Class 10.9	DIN 433	25	000000000	0000
			M10	10.5	18.0	1.4 to 1.8	ISO Class 10.9	DIN 433	25	000000000	0000
			M12	13.0	20.0	1.8 to 2.2	ISO Class 10.9	DIN 433	25	000000000	00000
			M14	15.0	24.0	2.3 to 2.7	ISO Class 10.9	DIN 433	10	000000000	00000
			M16	17.0	28.0	2.3 to 2.7	ISO Class 10.9	DIN 433	10	000000000	00000
			M20	21.0	34.0	2.7 to 3.3	ISO Class 10.9	DIN 433	5	000000000	00000

Structural Washers

Distribute pressure under structural screws and nuts in columns, joists, and I-beams. These thick washers are tested and certified to meet industry standards for handling high-stress loads.

Steel

Image of Product. Front orientation. Washers. Structural Washers.

Corrosion-Resistant Galvanized Steel—These washers combine the strength of steel with the rust resistance of stainless steel. They're an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals.

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.
Corrosion-Resistant Galvanized Steel



	M12	13.0	24.0	2.7 to 3.3	ISO Class 10.9	DIN 6916, ISO 7416	25	000000000	000000


	M14	15.0	28.0	2.7 to 3.3	ISO Class 10.9	DIN 6916, ISO 7416	10	000000000	00000
	M16	17.0	30.0	3.7 to 4.3	ISO Class 10.9	DIN 6916, ISO 7416	10	000000000	0000
	M20	21.0	37.0	3.7 to 4.3	ISO Class 10.9	DIN 6916, ISO 7416	10	000000000	00000
	M22	23.0	39.0	3.7 to 4.3	ISO Class 10.9	DIN 6916, ISO 7416	5	000000000	00000
	M24	25.0	44.0	3.7 to 4.3	ISO Class 10.9	DIN 6916, ISO 7416	5	000000000	00000
	M27	28.0	50.0	4.4 to 5.6	ISO Class 10.9	DIN 6916, ISO 7416	1	000000000	0000
	M30	31.0	56.0	4.4 to 5.6	ISO Class 10.9	DIN 6916, ISO 7416	1	000000000	0000

Tension-Indicating Structural Washers

Fasten structural screws and nuts securely without overtightening. When you see orange dye, you'll know you've applied the correct tension, so you don't accidentally strip threads. These washers distribute pressure under fasteners in columns, joists, and I-beams. They are tested and certified to meet industry standards for handling high-stress loads.

Steel

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

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



	M16	16.7	33.6	3.2 to 5.5	ISO Class 10.9	ASME B18.2.6M, ASTM F959	5	000000000	000000


	M20	21.0	40.6	3.6 to 6.0	ISO Class 10.9	ASME B18.2.6M, ASTM F959	5	000000000	00000
	M22	23.0	42.9	3.6 to 6.0	ISO Class 10.9	ASME B18.2.6M, ASTM F959	1	000000000	0000
	M24	25.1	48.7	4.0 to 7.0	ISO Class 10.9	ASME B18.2.6M, ASTM F959	1	000000000	0000
	M27	28.4	54.4	4.0 to 7.0	ISO Class 10.9	ASME B18.2.6M, ASTM F959	1	000000000	0000
	M30	31.4	58.4	4.0 to 7.0	ISO Class 10.9	ASME B18.2.6M, ASTM F959	1	000000000	0000
	M36	37.7	70.4	4.8 to 7.5	ISO Class 10.9	ASME B18.2.6M, ASTM F959	1	000000000	0000