DIN 127B Lock Washers | McMaster-Carr

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130 Products

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.

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.

Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these washers have a dark, matte coating to create a finished look. They won't rust in wet and outdoor environments, but can't hold up to harsh chemicals as well as 316 stainless steel.

Super-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.

Blue-Dyed Steel—These metric-sized washers have a distinctive blue color, so you can easily tell them apart from inch washers. The coating provides only minimal corrosion resistance, so these washers are best for dry environments.

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

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

Super-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.

Super-Corrosion-Resistant Silicon Bronze—The choice for marine environments, these washers won't rust or deteriorate when submerged in salt water. They resist corrosion as well as 316 stainless steel, but are not quite as strong.

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


		M2	2.4	4.4	0.4 to 0.6	DIN 127B	100	000000000	00000
		M2.5	2.9	5.1	0.5 to 0.7	DIN 127B	100	000000000	0000
		M2.6	3.0	5.2	0.5 to 0.7	DIN 127B	100	000000000	0000
		M3	3.4	6.2	0.7 to 0.9	DIN 127B	100	000000000	0000
		M3.5	3.9	6.7	0.7 to 0.9	DIN 127B	100	000000000	0000
		M4	4.4	7.6	0.8 to 1.0	DIN 127B	100	000000000	0000
		M5	5.4	9.2	1.1 to 1.3	DIN 127B	100	000000000	0000
		M6	6.5	11.8	1.5 to 1.7	DIN 127B	100	000000000	0000
		M7	7.5	12.8	1.5 to 1.7	DIN 127B	50	000000000	0000
		M8	8.5	14.8	1.9 to 2.1	DIN 127B	100	000000000	0000
		M10	10.7	18.1	2.0 to 2.4	DIN 127B	100	000000000	00000
		M12	12.7	21.1	2.3 to 2.7	DIN 127B	50	000000000	00000
		M14	14.7	24.1	2.8 to 3.2	DIN 127B	25	000000000	00000
		M16	17.0	27.4	3.3 to 3.7	DIN 127B	25	000000000	00000
		M18	19.0	29.4	3.3 to 3.7	DIN 127B	10	000000000	0000
		M20	21.2	33.6	3.8 to 4.2	DIN 127B	10	000000000	0000
		M22	22.5	35.9	3.8 to 4.2	DIN 127B	5	000000000	0000
		M24	25.5	40.0	4.8 to 5.2	DIN 127B	10	000000000	00000
		M27	27.5	43.0	4.8 to 5.2	DIN 127B	5	000000000	00000
		M30	31.7	48.2	5.8 to 6.2	DIN 127B	1	000000000	0000
		M36	37.7	58.2	5.8 to 6.2	DIN 127B	1	000000000	0000

		Black-Oxide 18-8 Stainless Steel


				M2	2.4	4.4	0.4 to 0.6	DIN 127B	10	000000000	0000
				M2.5	2.9	5.1	0.5 to 0.7	DIN 127B	10	000000000	0000
				M3	3.4	6.2	0.7 to 0.9	DIN 127B	10	000000000	0000
				M5	5.4	9.2	1.1 to 1.3	DIN 127B	10	000000000	0000
				M6	6.5	11.8	1.5 to 1.7	DIN 127B	10	000000000	0000
				M8	8.5	14.8	1.9 to 2.1	DIN 127B	10	000000000	0000
				M10	10.7	18.1	2.0 to 2.4	DIN 127B	10	000000000	0000
				M12	12.7	21.1	2.3 to 2.7	DIN 127B	10	000000000	0000
				M16	17.0	27.4	3.3 to 3.7	DIN 127B	10	000000000	0000
				M20	21.2	33.6	3.8 to 4.2	DIN 127B	10	000000000	00000

				Super-Corrosion-Resistant 316 Stainless Steel


						M2	2.4	4.4	0.4 to 0.6	DIN 127B	100	000000000	0000
						M2.5	2.9	5.1	0.5 to 0.7	DIN 127B	100	000000000	0000
						M3	3.4	6.2	0.7 to 0.9	DIN 127B	100	000000000	0000
						M3.5	3.9	6.7	0.7 to 0.9	DIN 127B	100	000000000	0000
						M4	4.4	7.6	0.8 to 1.0	DIN 127B	100	000000000	0000
						M5	5.4	9.2	1.1 to 1.3	DIN 127B	100	000000000	0000
						M6	6.5	11.8	1.5 to 1.7	DIN 127B	100	000000000	0000
						M8	8.5	14.8	1.9 to 2.1	DIN 127B	100	000000000	0000
						M10	10.7	18.1	2.0 to 2.4	DIN 127B	50	000000000	0000
						M12	12.7	21.1	2.3 to 2.7	DIN 127B	50	000000000	00000
						M14	14.7	24.1	2.8 to 3.2	DIN 127B	25	000000000	0000
						M16	17.0	27.4	3.3 to 3.7	DIN 127B	10	000000000	0000
						M18	19.0	29.4	3.3 to 3.7	DIN 127B	10	000000000	0000
						M20	21.2	33.6	3.8 to 4.2	DIN 127B	10	000000000	0000
						M24	25.5	40.0	4.8 to 5.2	DIN 127B	5	000000000	0000
						M30	31.7	48.2	5.8 to 6.2	DIN 127B	1	000000000	0000

						Zinc-Plated Steel


								M2	2.4	4.4	0.4 to 0.6	DIN 127B	100	000000000	0000
								M2.5	2.9	5.1	0.5 to 0.7	DIN 127B	100	000000000	0000
								M3	3.4	6.2	0.7 to 0.9	DIN 127B	100	000000000	0000
M3.5								3.6	6.7	0.7 to 0.9	DIN 127B	100	000000000	0000
M4	4.4							7.6	0.8 to 1.0	DIN 127B	100	000000000	0000
M5	5.4							9.2	1.1 to 1.3	DIN 127B	100	000000000	0000
M6	6.5							11.8	1.5 to 1.7	DIN 127B	100	000000000	0000
M7	7.5							12.8	1.5 to 1.7	DIN 127B	100	000000000	0000
M8	8.5							14.8	1.9 to 2.1	DIN 127B	100	000000000	0000
M10	10.7							18.1	2.0 to 2.4	DIN 127B	100	000000000	0000
M12	12.7							21.1	2.3 to 2.7	DIN 127B	100	000000000	00000
M14	14.7							24.1	2.8 to 3.2	DIN 127B	100	000000000	00000
M16	17.0							27.4	3.3 to 3.7	DIN 127B	50	000000000	00000
M18	19.0							29.4	3.3 to 3.7	DIN 127B	25	000000000	00000
M20	21.2							33.6	3.8 to 4.2	DIN 127B	25	000000000	00000
M22	22.5							35.9	3.8 to 4.2	DIN 127B	10	000000000	00000
M24	25.5							40.0	4.8 to 5.2	DIN 127B	25	000000000	00000
M27	28.5							43.0	4.8 to 5.2	DIN 127B	10	000000000	00000
M30	31.7							48.2	5.8 to 6.2	DIN 127B	10	000000000	00000
M33	33.5							55.2	5.8 to 6.2	DIN 127B	5	000000000	00000
M36	37.7							58.2	5.8 to 6.2	DIN 127B	5	000000000	00000
M42	43.7							68.2	6.8 to 7.2	DIN 127B	1	000000000	00000
M48	50.5							75.0	6.8 to 7.2	DIN 127B	1	000000000	00000

Zinc-Yellow-Chromate-Plated Steel


								M3	3.4	6.2	0.7 to 0.9	DIN 127B	100	000000000	0000
								M4	4.4	7.6	0.8 to 1.0	DIN 127B	100	000000000	0000
		M5						5.4	9.2	1.1 to 1.3	DIN 127B	100	000000000	0000
		M6	6.5					11.8	1.5 to 1.7	DIN 127B	100	000000000	0000
		M8	8.5					14.8	1.9 to 2.1	DIN 127B	100	000000000	0000
		M10	10.7					18.1	2.0 to 2.4	DIN 127B	100	000000000	00000
		M12	12.7					21.1	2.3 to 2.7	DIN 127B	50	000000000	0000
		M14	14.7					24.1	2.8 to 3.2	DIN 127B	50	000000000	00000
		M16	17.0					27.4	3.3 to 3.7	DIN 127B	25	000000000	0000
		M18	19.0					29.4	3.3 to 3.7	DIN 127B	25	000000000	00000
		M20	21.2					33.6	3.8 to 4.2	DIN 127B	10	000000000	0000
		M24	25.5					40.0	4.8 to 5.2	DIN 127B	10	000000000	0000
		M30	31.7					48.2	5.8 to 6.2	DIN 127B	5	000000000	00000

		Black-Oxide Steel


				M6				6.5	11.8	1.5 to 1.7	DIN 127B	100	000000000	00000
				M8	8.5			14.8	1.9 to 2.1	DIN 127B	100	000000000	00000
				M10	10.7			18.1	2.0 to 2.4	DIN 127B	50	000000000	0000
				M16	17.0			27.4	3.3 to 3.7	DIN 127B	25	000000000	0000

				Blue-Dyed Steel


								M3	3.4	6.2	0.7 to 0.9	DIN 127B	100	000000000	0000
								M4	4.5	7.6	0.8 to 1.0	DIN 127B	100	000000000	0000
								M5	5.4	9.2	1.1 to 1.3	DIN 127B	100	000000000	0000
								M6	6.5	11.8	1.5 to 1.7	DIN 127B	50	000000000	0000
								M8	8.5	14.8	1.9 to 2.1	DIN 127B	50	000000000	0000
								M10	10.7	18.1	2.0 to 2.4	DIN 127B	25	000000000	0000
								M12	12.7	21.1	2.3 to 2.7	DIN 127B	25	000000000	0000
								M16	17.0	27.4	3.3 to 3.7	DIN 127B	25	000000000	00000
								M20	21.2	33.6	3.8 to 4.2	DIN 127B	10	000000000	0000

								Steel


						M2				2.4	4.4	0.4 to 0.6	DIN 127B	100	000000000	0000
						M2.5	2.9			5.1	0.5 to 0.7	DIN 127B	100	000000000	0000
						M3	3.4			6.2	0.7 to 0.9	DIN 127B	100	000000000	0000
						M3.5	3.9			6.7	0.7 to 0.9	DIN 127B	100	000000000	0000
						M4	4.4			7.6	0.8 to 1.0	DIN 127B	100	000000000	0000
						M5	5.4			9.2	1.1 to 1.3	DIN 127B	100	000000000	0000
						M6	6.5			11.8	1.5 to 1.7	DIN 127B	100	000000000	0000
						M8	8.5			14.8	1.9 to 2.1	DIN 127B	100	000000000	0000
						M10	10.7			18.1	2.0 to 2.4	DIN 127B	100	000000000	0000
						M12	12.7			21.1	2.3 to 2.7	DIN 127B	100	000000000	0000
						M14	14.7			24.1	2.8 to 3.2	DIN 127B	100	000000000	00000
						M16	17.0			27.4	3.3 to 3.7	DIN 127B	50	000000000	00000
						M18	19.0			29.4	3.3 to 3.7	DIN 127B	50	000000000	00000
						M20	21.2			33.6	3.8 to 4.2	DIN 127B	25	000000000	00000
						M24	25.5			40.0	4.8 to 5.2	DIN 127B	25	000000000	00000
						M30	31.7			48.2	5.8 to 6.2	DIN 127B	5	000000000	00000
						M36	37.7			58.2	5.8 to 6.2	DIN 127B	1	000000000	0000

						Corrosion-Resistant Galvanized Steel


										M6	6.5	11.8	1.5 to 1.7	DIN 127B	50	000000000	0000
										M8	8.5	14.8	1.9 to 2.1	DIN 127B	50	000000000	00000
										M10	10.7	18.1	2.0 to 2.4	DIN 127B	50	000000000	00000
M12										12.7	21.1	2.3 to 2.7	DIN 127B	25	000000000	0000
M16	17.0									27.4	3.3 to 3.7	DIN 127B	10	000000000	0000
M20	21.2									33.6	3.8 to 4.2	DIN 127B	1	000000000	0000

Super-Corrosion-Resistant Zinc-Flake-Coated Steel


										M6	6.5	11.8	1.5 to 1.7	DIN 127B	25	000000000	0000
										M8	8.5	14.8	1.9 to 2.1	DIN 127B	25	000000000	00000
										M10	10.7	18.1	2.0 to 2.4	DIN 127B	25	000000000	00000

										Super-Corrosion-Resistant Silicon Bronze


												M3	3.4	6.2	0.7 to 0.9	DIN 127B	100	000000000	00000
												M4	4.4	7.6	0.8 to 1.0	DIN 127B	100	000000000	00000
												M5	5.4	9.2	1.1 to 1.3	DIN 127B	100	000000000	00000
												M6	6.5	11.8	1.5 to 1.7	DIN 127B	50	000000000	00000
		M8										8.5	14.8	1.9 to 2.1	DIN 127B	25	000000000	00000
		M10	10.7									18.1	2.0 to 2.4	DIN 127B	10	000000000	0000

Split Lock Washer Assortments

Image of Product. Front orientation. Lock Washers. Sold as Assortments, Split-Lock Washer.

Keep a collection of common lock washers on hand to stop nuts and screws from loosening due to mild vibration. These washers have split ends that bite into the fastener to keep it 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.

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

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

	Sizes Included	Specs. Met	Container Type		Each
18-8 Stainless Steel


	755	For M3 to M20 Screw Sizes	DIN 127B	Plastic Box	000000000	0000000

	Steel


			755	For M3 to M20 Screw Sizes	DIN 127B	Plastic Box	000000000	00000