ISO Class 12.9 Washers | McMaster-Carr

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System of Measurement

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Fastener Strength Grade/Class

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Zinc Yellow-Chromate Plated

Material

Steel

Fastener Strength Rating

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Thickness

Hardness

Performance

Specifications Met

Washer Designation

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Export Control Classification Number (ECCN)

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10 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-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-Yellow-Chromate-Plated Steel



	M6	6.5	12.0	1.5 to 1.6	ISO Class 12.9	DIN 125	250	000000000	00000


	M8	8.5	16.0	1.4 to 1.5	ISO Class 12.9	DIN 125	250	000000000	0000
	M10	10.6	20.0	1.9 to 2.0	ISO Class 12.9	DIN 125	100	000000000	0000
	M12	13.1	24.0	2.4 to 2.5	ISO Class 12.9	DIN 125	50	000000000	0000
	M14	15.0	28.0	2.3 to 2.7	ISO Class 12.9	DIN 125	25	000000000	0000
	M16	17.1	30.0	2.9 to 3.0	ISO Class 12.9	DIN 125	25	000000000	0000
	M20	21.1	37.0	2.9 to 3.0	ISO Class 12.9	DIN 125	25	000000000	0000
	M22	23.0	39.0	2.7 to 3.3	ISO Class 12.9	DIN 125, ISO 7089	25	000000000	0000
	M24	25.2	44.0	3.9	ISO Class 12.9	DIN 125	10	000000000	0000
	M30	31.0	56.0	3.7 to 4.3	ISO Class 12.9	DIN 125, ISO 7089	10	000000000	0000