Metric Split Lock Washers For Socket Head Screws

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Zinc Yellow-Chromate Plated

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70 Products

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.

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.

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.

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.

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



		M3	3.4	5.6	0.9 to 1.1	DIN 7980	100	000000000	00000


		M3.5	3.9	6.1	0.9 to 1.1	DIN 7980	100	000000000	0000
		M4	4.4	7.0	1.1 to 1.3	DIN 7980	100	000000000	0000
		M5	5.4	8.8	1.5 to 1.7	DIN 7980	100	000000000	0000
		M6	6.5	9.9	1.5 to 1.7	DIN 7980	100	000000000	0000
		M8	8.5	12.7	1.9 to 2.1	DIN 7980	100	000000000	0000
		M10	10.7	16.0	2.3 to 2.7	DIN 7980	100	000000000	00000
		M12	12.7	18.0	2.3 to 2.7	DIN 7980	50	000000000	0000
		M14	14.7	21.1	2.8 to 3.2	DIN 7980	10	000000000	0000
		M16	17.0	24.4	3.3 to 3.7	DIN 7980	10	000000000	0000
		M18	19.0	26.4	3.3 to 3.7	DIN 7980	10	000000000	0000


		M20	21.2	30.6	4.3 to 4.7	DIN 7980	10	000000000	00000
		M22	23.5	32.9	4.3 to 4.7	DIN 7980	5	000000000	00000
		M24	25.5	35.9	4.8 to 5.2	DIN 7980	5	000000000	0000
		M30	31.7	44.1	5.8 to 6.2	DIN 7980	1	000000000	00000


		Highly-Corrosion-Resistant 316 Stainless Steel



				M3	3.4	5.6	0.9 to 1.1	DIN 7980	100	000000000	0000


				M4	4.4	7.0	1.1 to 1.3	DIN 7980	100	000000000	0000
				M5	5.4	8.8	1.5 to 1.7	DIN 7980	100	000000000	0000
				M6	6.5	9.9	1.5 to 1.7	DIN 7980	100	000000000	0000
				M8	8.5	12.7	1.9 to 2.1	DIN 7980	50	000000000	0000
				M10	10.7	16.0	2.3 to 2.7	DIN 7980	50	000000000	00000
				M12	12.7	18.0	2.3 to 2.7	DIN 7980	25	000000000	00000
				M14	14.7	21.1	2.8 to 3.2	DIN 7980	10	000000000	0000
				M16	17.0	24.4	3.3 to 3.7	DIN 7980	10	000000000	0000
				M18	19.0	26.4	3.3 to 3.7	DIN 7980	10	000000000	0000
				M20	21.2	30.6	4.3 to 4.7	DIN 7980	1	000000000	0000


				M22	23.5	32.9	4.3 to 4.7	DIN 7980	1	000000000	0000
				M24	25.5	35.9	4.8 to 5.2	DIN 7980	1	000000000	0000
				M30	31.7	44.1	5.8 to 6.2	DIN 7980	1	000000000	00000


				Zinc-Plated Steel



						M3	3.4	5.6	0.9 to 1.1	DIN 7980	100	000000000	0000


						M4	4.4	7.0	1.1 to 1.3	DIN 7980	100	000000000	0000
						M5	5.4	8.8	1.5 to 1.7	DIN 7980	100	000000000	0000
						M6	6.5	9.9	1.5 to 1.7	DIN 7980	100	000000000	0000
						M8	8.5	12.7	1.9 to 2.1	DIN 7980	100	000000000	0000
						M10	10.7	16.0	2.3 to 2.7	DIN 7980	100	000000000	00000
						M12	12.7	18.0	2.3 to 2.7	DIN 7980	100	000000000	00000
						M14	14.7	21.1	2.8 to 3.2	DIN 7980	50	000000000	00000
						M16	17.0	24.4	3.3 to 3.7	DIN 7980	25	000000000	0000
						M18	19.0	26.4	3.3 to 3.7	DIN 7980	25	000000000	00000
M20						21.2	30.6	4.3 to 4.7	DIN 7980	10	000000000	0000


M24	25.5					35.9	4.8 to 5.2	DIN 7980	10	000000000	0000
M27	28.5					38.9	4.8 to 5.2	DIN 7980	5	000000000	0000
M30	31.7					44.1	5.8 to 6.2	DIN 7980	5	000000000	00000
M36	37.7					52.2	6.7 to 7.3	DIN 7980	1	000000000	0000


Zinc-Yellow-Chromate-Plated Steel



						M4	4.1	7.0	1.1 to 1.3	DIN 7980	100	000000000	0000


						M5	5.1	8.8	1.5 to 1.7	DIN 7980	25	000000000	0000
						M6	6.1	9.9	1.5 to 1.7	DIN 7980	100	000000000	0000
						M8	8.1	12.7	1.9 to 2.1	DIN 7980	100	000000000	0000
						M10	10.2	16.0	2.3 to 2.7	DIN 7980	100	000000000	00000
						M12	12.2	18.0	2.3 to 2.7	DIN 7980	100	000000000	00000
						M16	16.2	24.4	3.3 to 3.7	DIN 7980	25	000000000	00000


						Black-Oxide Steel



			M3				3.4	5.6	0.9 to 1.1	DIN 7980	100	000000000	0000


			M3.5				3.9	6.1	0.9 to 1.1	DIN 7980	100	000000000	0000
			M4				4.4	7.0	1.1 to 1.3	DIN 7980	100	000000000	0000
			M5				5.4	8.8	1.5 to 1.7	DIN 7980	100	000000000	0000
			M6				6.5	9.9	1.5 to 1.7	DIN 7980	100	000000000	0000
			M8				8.5	12.7	1.9 to 2.1	DIN 7980	100	000000000	0000
			M10				10.7	16.0	2.3 to 2.7	DIN 7980	100	000000000	00000
			M12				12.7	18.0	2.3 to 2.7	DIN 7980	100	000000000	00000
			M14				14.7	21.1	2.8 to 3.2	DIN 7980	100	000000000	00000
			M16				17.0	24.4	3.3 to 3.7	DIN 7980	50	000000000	00000
			M18				19.0	26.4	3.3 to 3.7	DIN 7980	25	000000000	0000


			M20				21.2	30.6	4.3 to 4.7	DIN 7980	25	000000000	00000
			M22				23.5	32.9	4.3 to 4.7	DIN 7980	10	000000000	0000
			M24				25.5	35.9	4.8 to 5.2	DIN 7980	10	000000000	00000
			M27				28.5	38.9	4.8 to 5.2	DIN 7980	5	000000000	0000
			M30				31.7	44.1	5.8 to 6.2	DIN 7980	5	000000000	00000
			M36				37.7	52.2	6.7 to 7.3	DIN 7980	1	000000000	0000
			M42				43.7	60.2	7.7 to 8.3	DIN 7980	1	000000000	00000
			M48	50.5			67.0	7.7 to 8.3	DIN 7980	1	000000000	00000