Metric Tab Lock Washers | McMaster-Carr

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449 Products

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Washer Type

Split

Stop nuts and screws from loosening due to light vibration

313 products

Tooth

Grip better than split lock washers in applications with constant movement

130 products

Washer Type

Countersunk

Grip flat- and oval-head screws for a secure hold without overtightening

7 products

Wave

Keep bolted assemblies secure on slightly uneven surfaces

19 products

Tab Lock Washers

1 Tab

Instead of relying on friction, these washers lock mechanically for more holding power than split and tooth lock washers. Bend the tabs with a wrench to stop both the fastener and washer from rotating. They are often used in applications with moderate vibration, such as motors, mixers, and pumps. These washers are not reusable because the tabs will weaken if you bend them repeatedly.

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.

1 Tab—Bend the tab down over the edge of your mounting surface, and bend the side of the washer up against the nut or screw.

	ID, mm	OD, mm	Thk., mm	No. of Tabs	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M4	4.3	14.0	0.4	1	100	97471A141	000000


	M5	5.3	17.0	0.5	1	50	97471A142	00000
	M6	6.4	19.0	0.5	1	50	97471A143	00000
	M8	8.4	22.0	0.8	1	25	97471A144	0000
	M10	10.5	26.0	0.8	1	25	97471A145	00000
	M12	13.0	30.0	1.0	1	10	97471A146	0000

Curved Spring Lock Washers

The curvy, spring-like shape adds a small amount of tension to prevent nuts and screws from backing out due to mild vibration. These washers also flex slightly to compensate for uneven surfaces. While more secure than a standard flat washer, these have the least amount of gripping power of all our lock washers. They are best suited for electrical panels, light fixtures, and other light duty assemblies. These washers hold their shape when untightened, so you can reuse them a handful of times without losing strength.

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.

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

DIN 128A—These washers have split ends that bite into your material surface for a tighter hold than other curved washers.

	ID, mm	OD, mm	Thk., mm	Overall Ht., mm	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M2.5	2.6	5.1	0.5	0.9	DIN 128A	100	97093A138	00000


	M3	3.1	6.2	0.6	1.1	DIN 128A	100	97093A139	0000
	M4	4.1	7.6	0.7	1.2	DIN 128A	100	97093A141	0000
	M5	5.1	9.2	0.9	1.5	DIN 128A	100	97093A142	00000
	M6	6.1	11.8	1.2	2.0	DIN 128A	100	97093A143	00000
	M8	8.1	14.8	1.5	2.5	DIN 128A	50	97093A144	0000
	M10	10.2	18.1	1.7	2.9	DIN 128A	50	97093A145	00000
	M12	12.2	21.1	2.0	3.4	DIN 128A	50	97093A146	00000
	M14	14.2	24.1	2.3	3.9	DIN 128A	25	97093A147	00000
	M16	16.2	27.4	2.7	4.5	DIN 128A	20	97093A148	00000
	M18	18.2	29.4	2.7	4.5	DIN 128A	10	97093A149	00000


	M20	20.2	33.6	3.0	5.1	DIN 128A	10	97093A151	00000
	M22	22.5	35.9	3.0	5.1	DIN 128A	5	97093A152	0000
	M24	24.5	40.0	3.8	6.5	DIN 128A	5	97093A153	00000


	Zinc-Plated Steel



			M2.5	2.6	5.1	0.5	0.9	DIN 128A	100	97093A122	0000


			M3	3.1	6.2	0.6	1.1	DIN 128A	100	97093A123	0000
			M4	4.1	7.6	0.7	1.2	DIN 128A	100	97093A124	0000
			M5	5.1	9.2	0.9	1.5	DIN 128A	100	97093A125	0000
			M6	6.1	11.8	1.2	2.0	DIN 128A	100	97093A126	0000
			M8	8.1	14.8	1.5	2.5	DIN 128A	100	97093A127	00000
			M10	10.2	18.1	1.7	2.9	DIN 128A	100	97093A128	00000
			M12	12.2	21.1	2.0	3.4	DIN 128A	50	97093A129	00000
			M14	14.2	24.1	2.3	3.9	DIN 128A	25	97093A131	00000
			M16	16.2	27.4	2.7	4.5	DIN 128A	25	97093A132	00000
			M18	18.2	29.4	2.7	4.5	DIN 128A	10	97093A133	0000


			M20	20.2	33.6	3.0	5.1	DIN 128A	10	97093A134	00000
			M22	22.5	35.9	3.0	5.1	DIN 128A	10	97093A135	00000
			M24	24.5	40.0	3.8	6.5	DIN 128A	10	97093A136	00000
			M30	30.5	48.2	5.8	9.5	DIN 128A	1	97093A137	0000


			Zinc-Yellow-Chromate-Plated Steel



					M3	3.1	6.2	0.6	1.1	DIN 128A	100	96982A136	0000


					M3.5	3.6	6.7	0.6	1.1	DIN 128A	100	96982A137	0000
					M4	4.1	7.6	0.7	1.2	DIN 128A	100	96982A138	0000
					M5	5.1	9.2	0.9	1.5	DIN 128A	100	96982A139	0000
					M6	6.1	11.8	1.2	2	DIN 128A	100	96982A141	0000
					M8	8.1	14.8	1.5	2.5	DIN 128A	100	96982A142	0000
					M10	10.2	18.1	1.7	2.9	DIN 128A	100	96982A143	00000
					M12	12.2	21.1	2.0	3.4	DIN 128A	50	96982A144	0000
					M14	14.2	24.1	2.3	3.9	DIN 128A	25	96982A145	00000
					M16	16.2	27.4	2.7	4.5	DIN 128A	10	96982A146	00000
M20					20.2	33.6	3.0	5.1	DIN 128A	10	96982A147	00000


Steel



					M2.5	2.3	4.6	0.6	1.1	DIN 6905	200	91169A311	00000


					M3	2.7	5.6	0.7	1.3	DIN 6905	200	91169A312	00000
					M3	3.1	6.2	0.6	1.1	DIN 128A	100	97093A111	0000
					M4	3.6	7.0	0.8	1.4	DIN 6905	200	91169A314	00000
					M4	4.1	7.6	0.7	1.2	DIN 128A	100	97093A112	0000
					M5	4.6	8.6	1.0	1.7	DIN 6905	100	91169A315	00000
					M5	5.1	9.2	0.9	1.5	DIN 128A	100	97093A113	0000
					M6	5.5	11.0	1.3	2.2	DIN 6905	50	91169A316	00000
					M6	6.1	11.8	1.2	2.0	DIN 128A	50	97093A114	0000
					M8	7.4	14.0	1.6	2.8	DIN 6905	50	91169A317	00000
					M8	8.1	14.8	1.5	2.5	DIN 128A	50	97093A115	0000


					M10	9.3	17.0	1.8	3.2	DIN 6905	10	91169A318	00000
					M10	10.2	18.1	1.7	2.9	DIN 128A	25	97093A116	00000
					M12	11.0	19.7	2.1	3.7	DIN 6905	10	91169A319	00000
	M12				12.2	21.1	2.0	3.4	DIN 128A	10	97093A117	0000
	M16	16.2			27.4	2.7	4.5	DIN 128A	10	97093A118	0000
	M20	20.2			33.6	3.0	5.1	DIN 128A	5	97093A119	0000
	M24	24.5			40.0	3.8	6.5	DIN 128A	5	97093A121	00000

Tooth Lock Washers

Grip tighter than split lock washers to prevent nuts and screws from loosening in applications with constant movement, such as conveyors. Tooth lock washers typically can't be reused because the teeth often get bent when tightened.

External Tooth

Teeth on the outside edge bite into both the fastener and the mating surface for a stronger hold than internal-tooth lock washers. However, they may mar your material and snag on objects. Pair these washers with nuts and screws that are large enough to make contact with the teeth, such as pan, button, and binding head screws.

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.

DIN 6798—Best for slightly bumpy or irregular surfaces because the teeth are angled to make even contact with the material.

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



		M2	2.2	4.5	0.2 to 0.4	DIN 6797	100	95060A510	00000


		M2	2.2	4.5	0.2 to 0.4	DIN 6798	100	91120A311	0000
		M2.5	2.7	5.5	0.3 to 0.5	DIN 6797	100	95060A520	0000
		M2.5	2.7	5.5	0.3 to 0.5	DIN 6798	100	91120A312	0000
		M3	3.2	6.0	0.3 to 0.5	DIN 6797	100	95060A320	0000
		M3	3.2	6.0	0.3 to 0.5	DIN 6798	100	91120A120	0000
		M3.5	3.7	7.0	0.4 to 0.6	DIN 6797	100	95060A530	0000
		M4	4.3	8.0	0.4 to 0.6	DIN 6797	100	95060A330	0000
		M4	4.3	8.0	0.4 to 0.6	DIN 6798	100	91120A130	0000
		M5	5.3	10.0	0.5 to 0.7	DIN 6797	100	95060A350	0000
		M5	5.3	10.0	0.5 to 0.7	DIN 6798	100	91120A140	0000


		M6	6.4	11.0	0.6 to 0.8	DIN 6797	100	95060A360	0000
		M6	6.4	11.0	0.6 to 0.8	DIN 6798	100	91120A160	0000
		M7	7.4	12.5	0.7 to 0.9	DIN 6797	100	95060A460	0000
		M8	8.4	15.0	0.7 to 0.9	DIN 6797	100	95060A390	0000
		M8	8.4	15.0	0.7 to 0.9	DIN 6798	100	91120A180	0000
		M10	10.5	18.0	0.8 to 1.0	DIN 6797	100	95060A400	0000
		M10	10.5	18.0	0.8 to 1.0	DIN 6798	100	91120A200	00000
		M12	13.0	20.5	0.9 to 1.2	DIN 6797	50	95060A411	0000
		M12	13.0	20.5	0.9 to 1.2	DIN 6798	50	91120A211	0000
		M14	15.0	24.0	0.9 to 1.2	DIN 6797	50	95060A420	0000


		M16	17.0	26.0	1.0 to 1.4	DIN 6797	50	95060A540	00000
		M16	17.0	26.0	1.0 to 1.4	DIN 6798	50	91120A235	00000
		M18	19.0	30.0	1.2 to 1.6	DIN 6797	10	95060A440	0000
		M20	21.0	33.0	1.2 to 1.5	DIN 6798	10	91120A241	0000
		M20	21.0	33.0	1.2 to 1.6	DIN 6797	10	95060A450	0000
		M22	23.0	36.0	1.3 to 1.7	DIN 6797	10	95060A470	0000
		M24	25.0	38.0	1.3 to 1.7	DIN 6797	10	95060A480	0000
		M24	25.0	38.0	1.4 to 1.6	DIN 6798	10	91120A245	0000
		M30	31.0	48.0	1.4 to 1.8	DIN 6797	10	95060A500	00000


		Highly Corrosion-Resistant 316 Stainless Steel



				M3	3.2	6.0	0.3 to 0.5	DIN 6797	5	90412A110	0000


				M4	4.3	8.0	0.4 to 0.6	DIN 6797	5	90412A120	0000
				M5	5.3	10.0	0.5 to 0.7	DIN 6797	5	90412A130	0000
				M6	6.4	11.0	0.6 to 0.8	DIN 6797	5	90412A140	0000
				M8	8.4	15.0	0.7 to 0.9	DIN 6797	5	90412A150	0000
				M10	10.5	18.0	0.8 to 1.0	DIN 6797	1	90412A160	0000
				M12	13.0	20.5	0.9 to 1.2	DIN 6797	1	90412A170	0000
				M14	15.0	24.0	0.9 to 1.2	DIN 6797	1	90412A180	0000
				M16	17.3	26.0	1.0 to 1.4	DIN 6797	1	90412A190	0000
				M20	21.0	33.0	1.2 to 1.6	DIN 6797	1	90412A200	0000


				Zinc-Plated Steel



						M2	2.3	4.5	0.2 to 0.4	DIN 6797	100	97985A111	0000


M2.5	2.8					5.5	0.3 to 0.5	DIN 6797	100	97985A112	0000
M3	3.2					6.0	0.3 to 0.5	DIN 6797	100	97985A520	0000
M3	3.2					6.0	0.4 to 0.5	DIN 6798	100	97985A720	0000
M3.5	3.9					7.0	0.9 to 1.2	DIN 6797	100	97985A211	0000
M4	4.3					8.0	0.4 to 0.6	DIN 6797	100	97985A530	0000
M4	4.3					8.0	0.5 to 0.6	DIN 6798	100	97985A730	0000
M5	5.3					10.0	0.5 to 0.7	DIN 6797	100	97985A550	0000
M5	5.3					10.0	0.6 to 0.7	DIN 6798	100	97985A740	0000
M6	6.4					11.0	0.6 to 0.8	DIN 6797	100	97985A560	0000
M6	6.4					11.0	0.7 to 0.8	DIN 6798	100	97985A760	0000


M7	7.4					12.5	0.7 to 0.9	DIN 6797	25	97985A113	0000
M8	8.4					14.0	0.8 to 0.9	DIN 6798	100	97985A780	0000
M8	8.4					15.0	0.7 to 0.9	DIN 6797	100	97985A590	0000
M10	10.5					18.0	0.8 to 1.0	DIN 6797	50	97985A600	0000
M10	10.5					18.0	0.9 to 1.0	DIN 6798	50	97985A800	0000
M12	13.0					20.5	0.9 to 1.2	DIN 6797	25	97985A611	0000
M12	13.0					20.5	1.0 to 1.2	DIN 6798	50	97985A810	0000
M14	15.0					24.0	0.9 to 1.2	DIN 6797	25	97985A620	0000
M16	17.3					26.0	1.0 to 1.4	DIN 6797	25	97985A630	0000
M18	19.0					30.0	1.2 to 1.6	DIN 6797	5	97985A640	0000


M20	21.0					33.0	1.2 to 1.6	DIN 6797	5	97985A650	0000
M22	23.0					36.0	1.3 to 1.7	DIN 6797	5	97985A114	0000
M24	25.0					38.0	1.3 to 1.7	DIN 6797	5	97985A660	0000
M30	31.0					48.0	1.4 to 1.8	DIN 6797	5	97985A116	0000

Internal Tooth

Internal teeth dig into the nut or screw to prevent it from backing out. Unlike external-tooth lock washers, these have a smooth outside edge, so they are less likely to mar your material or snag on objects. However, they don’t grip quite as well. Pair them with fasteners that have small diameters, such as fillister and cheese head screws.

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

Black-Oxide Steel—Best for dry environments since moisture will cause these washers to rust. They have a dark, matte appearance.

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



		M2	2.2	4.5	0.2 to 0.4	DIN 6797	100	93925A210	00000


		M2.3	2.5	5.0	0.2 to 0.4	DIN 6797	100	93925A411	0000
		M2.5	2.7	5.5	0.2 to 0.5	DIN 6797	100	93925A220	0000
		M3	3.2	6.0	0.3 to 0.5	DIN 6797	100	93925A240	0000
		M3.5	3.7	7.0	0.4 to 0.6	DIN 6797	100	93925A221	0000
		M4	4.3	8.0	0.4 to 0.6	DIN 6797	100	93925A250	0000
		M5	5.3	10.0	0.5 to 0.7	DIN 6797	100	93925A260	0000
		M6	6.4	11.0	0.6 to 0.8	DIN 6797	100	93925A270	0000
		M7	7.4	12.5	0.7 to 0.9	DIN 6797	50	93925A412	00000
		M8	8.4	15.0	0.7 to 0.9	DIN 6797	100	93925A280	0000
		M10	10.5	18.0	0.8 to 1.0	DIN 6797	50	93925A290	0000


		M12	13.0	20.5	0.9 to 1.2	DIN 6797	50	93925A300	0000
		M14	15.0	24.0	0.9 to 1.2	DIN 6797	25	93925A310	0000
		M16	17.0	26.0	1.0 to 1.4	DIN 6797	25	93925A320	0000
		M18	19.0	30.0	1.2 to 1.5	DIN 6797	10	93925A330	0000
		M20	21.0	33.0	1.2 to 1.5	DIN 6797	10	93925A340	0000
		M22	23.0	36.0	1.3 to 1.6	DIN 6797	10	93925A413	00000
		M24	25.0	38.0	1.3 to 1.6	DIN 6797	10	93925A414	00000


		Zinc-Plated Steel



				M2	2.2	4.5	0.2 to 0.4	DIN 6797	100	93925A415	0000


				M2.5	2.7	5.5	0.2 to 0.5	DIN 6797	100	93925A416	0000
				M3	3.2	6.0	0.3 to 0.5	DIN 6797	100	93925A417	0000
				M3.5	3.7	7.0	0.4 to 0.6	DIN 6797	100	93925A418	0000
				M4	4.3	8.0	0.4 to 0.6	DIN 6797	100	93925A419	0000
				M5	5.3	10.0	0.5 to 0.7	DIN 6797	100	93925A420	0000
				M6	6.4	11.0	0.6 to 0.8	DIN 6797	100	93925A421	0000
				M7	7.4	12.5	0.7 to 0.9	DIN 6797	100	93925A422	0000
				M8	8.4	15.0	0.7 to 0.9	DIN 6797	100	93925A423	0000
				M10	10.5	18.0	0.8 to 1.0	DIN 6797	50	93925A424	0000
				M12	13.0	20.5	0.9 to 1.2	DIN 6797	50	93925A425	00000


				M14	15.0	24.0	0.9 to 1.2	DIN 6797	25	93925A426	0000
				M16	17.0	26.0	1.0 to 1.4	DIN 6797	25	93925A427	0000
				M18	19.0	30.0	1.2 to 1.5	DIN 6797	10	93925A428	0000
				M20	21.0	33.0	1.2 to 1.5	DIN 6797	10	93925A429	00000
				M24	25.0	38.0	1.3 to 1.6	DIN 6797	10	93925A430	00000


				Black-Oxide Steel



						M2	2.2	4.5	0.2 to 0.4	DIN 6797	100	91106A120	0000


						M2.5	2.7	5.5	0.2 to 0.5	DIN 6797	100	91106A150	0000
						M2.6	2.8	5.5	0.3 to 0.5	DIN 6797	100	91106A121	0000
						M3	3.2	6.0	0.3 to 0.5	DIN 6797	100	91106A122	0000
						M3.5	3.7	7.0	0.4 to 0.6	DIN 6797	100	91106A123	0000
M4						4.3	8.0	0.4 to 0.6	DIN 6797	100	91106A124	0000
M5	5.3					10.0	0.5 to 0.7	DIN 6797	100	91106A126	0000
M6	6.4					11.0	0.6 to 0.8	DIN 6797	100	91106A128	0000
M8	8.4					15.0	0.7 to 0.9	DIN 6797	100	91106A131	0000
M10	10.5					18.0	0.8 to 1.0	DIN 6797	50	91106A133	0000
M12	13.0					20.5	0.9 to 1.2	DIN 6797	50	91106A135	0000


M14	15.0					24.0	0.9 to 1.2	DIN 6797	25	91106A137	0000
M16	17.0					26.0	1.0 to 1.4	DIN 6797	25	91106A139	0000
M18	19.0					30.0	1.2 to 1.5	DIN 6797	10	91106A142	0000
M20	21.0					33.0	1.2 to 1.5	DIN 6797	10	91106A146	00000

Internal and External Tooth

The strongest hold of all our tooth lock washers, these combine internal and external teeth to boost gripping power. However, the teeth may mar your material and snag on objects. Pair these washers with fasteners that are large enough to make contact with the external teeth, such as pan, button, and binding head screws.

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

	ID, mm	OD, mm	Thk., mm	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M3	3.2	12.0	1.4 to 1.7	50	95795A111	000000


	M4	4.3	15.0	1.9 to 2.3	50	95795A112	00000
	M4	4.3	18.0	2.2 to 2.6	25	95795A113	00000
	M5	5.3	18.0	2.2 to 2.6	25	95795A114	00000
	M6	6.5	18.0	2.2 to 2.6	25	95795A115	00000
	M8	8.5	22.0	2.7 to 3.3	25	95795A116	00000
	M10	10.5	26.0	2.7 to 3.3	10	95795A117	00000
	M12	12.5	30.0	3.2 to 4.0	10	95795A118	00000
	M16	16.5	35.0	3.8 to 4.6	5	95795A119	00000

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.

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.

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—Best for dry environments since moisture will cause these washers to rust. They have a dark, matte appearance.

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.

Highly Corrosion-Resistant Zinc-Flake-Coated Steel—With 40 times the corrosion resistance of zinc-plated steel, they have been tested to extreme standards, including 1,000 hours of salt spray. They are similar to Magni-coated washers.

Highly 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.

Large Pack—Priced at least 30% lower per washer than small packs.

					Small Pack			Large Pack
	For Screw Size	ID, mm	OD, mm	Thk., mm	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
18-8 Stainless Steel



		M2	2.4	4.4	0.4 to 0.6	100	92148A050	00000	—	———	0


		M2.5	2.9	5.1	0.5 to 0.7	100	92148A070	0000	—	———	0
		M2.6	3.0	5.2	0.5 to 0.7	100	92148A110	0000	—	———	0
		M3	3.4	6.2	0.7 to 0.9	100	92148A150	0000	—	———	0
		M3.5	3.9	6.7	0.7 to 0.9	100	92148A155	0000	—	———	0
		M4	4.4	7.6	0.8 to 1.0	100	92148A160	0000	—	———	0
		M5	5.4	9.2	1.1 to 1.3	100	92148A170	0000	—	———	0
		M6	6.5	11.8	1.5 to 1.7	100	92148A180	0000	—	———	0
		M7	7.5	12.8	1.5 to 1.7	50	92148A311	0000	—	———	0
		M8	8.5	14.8	1.9 to 2.1	100	92148A200	00000	2,000	92148A411	0000000
		M10	10.7	18.1	2.0 to 2.4	100	92148A210	00000	2,000	92148A412	000000


		M12	12.7	21.1	2.3 to 2.7	50	92148A214	00000	1,000	92148A413	000000
		M14	14.7	24.1	2.8 to 3.2	25	92148A221	00000	500	92148A414	000000
		M16	17.0	27.4	3.3 to 3.7	25	92148A241	00000	500	92148A415	000000
		M18	19.0	29.4	3.3 to 3.7	10	92148A251	0000	—	———	0
		M20	21.2	33.6	3.8 to 4.2	10	92148A261	0000	200	92148A416	000000
		M22	22.5	35.9	3.8 to 4.2	5	92148A111	0000	—	———	0
		M24	25.5	40.0	4.8 to 5.2	10	92148A271	00000	—	———	0
		M27	27.5	43.0	4.8 to 5.2	5	92148A112	00000	—	———	0
		M30	31.7	48.2	5.8 to 6.2	1	92148A281	0000	—	———	0
		M36	37.7	58.2	5.8 to 6.2	1	92148A291	0000	—	———	0


		Black-Oxide 18-8 Stainless Steel



				M2	2.4	4.4	0.4 to 0.6	10	92148A331	0000	—	———	0


				M2.5	2.9	5.1	0.5 to 0.7	10	92148A332	0000	—	———	0
				M3	3.4	6.2	0.7 to 0.9	10	92148A333	0000	—	———	0
				M5	5.4	9.2	1.1 to 1.3	10	92148A334	0000	—	———	0
				M6	6.5	11.8	1.5 to 1.7	10	92148A335	0000	—	———	0
				M8	8.5	14.8	1.9 to 2.1	10	92148A336	0000	—	———	0
				M10	10.7	18.1	2.0 to 2.4	10	92148A337	0000	—	———	0
				M12	12.7	21.1	2.3 to 2.7	10	92148A338	0000	—	———	0
				M16	17.0	27.4	3.3 to 3.7	10	92148A339	00000	—	———	0
				M20	21.2	33.6	3.8 to 4.2	10	92148A341	00000	—	———	0


				Highly Corrosion-Resistant 316 Stainless Steel



						M2	2.4	4.4	0.4 to 0.6	100	92153A406	0000	—	———	0


						M2.5	2.9	5.1	0.5 to 0.7	100	92153A411	0000	—	———	0
						M3	3.4	6.2	0.7 to 0.9	100	92153A416	0000	2,000	92153A211	00000
						M3.5	3.9	6.7	0.7 to 0.9	100	92153A451	0000	—	———	0
						M4	4.4	7.6	0.8 to 1.0	100	92153A418	0000	2,000	92153A212	00000
						M5	5.4	9.2	1.1 to 1.3	100	92153A422	0000	2,000	92153A213	00000
						M6	6.5	11.8	1.5 to 1.7	100	92153A426	0000	2,000	92153A214	00000
						M8	8.5	14.8	1.9 to 2.1	100	92153A429	00000	2,000	92153A215	000000
						M10	10.7	18.1	2.0 to 2.4	50	92153A434	0000	1,000	92153A216	000000
						M12	12.7	21.1	2.3 to 2.7	50	92153A436	00000	1,000	92153A217	000000
M14						14.7	24.1	2.8 to 3.2	25	92153A439	00000	—	———	0


M16	17.0					27.4	3.3 to 3.7	10	92153A442	0000	200	92153A218	00000
M18	19.0					29.4	3.3 to 3.7	10	92153A445	0000	—	———	0
M20	21.2					33.6	3.8 to 4.2	10	92153A447	00000	—	———	0
M24	25.5					40.0	4.8 to 5.2	5	92153A449	0000	—	———	0
M30	31.7					48.2	5.8 to 6.2	1	92153A453	0000	—	———	0


Zinc-Plated Steel



						M2	2.4	4.4	0.4 to 0.6	100	91202A214	0000	—	———	0


						M2.5	2.9	5.1	0.5 to 0.7	100	91202A218	0000	—	———	0
						M3	3.4	6.2	0.7 to 0.9	100	91202A222	0000	2,000	91202A311	00000
						M3.5	3.6	6.7	0.7 to 0.9	100	91202A224	0000	—	———	0
						M4	4.4	7.6	0.8 to 1.0	100	91202A226	0000	2,000	91202A312	00000
						M5	5.4	9.2	1.1 to 1.3	100	91202A230	0000	2,000	91202A313	00000
						M6	6.5	11.8	1.5 to 1.7	100	91202A234	0000	2,000	91202A314	00000
						M7	7.5	12.8	1.5 to 1.7	100	91202A111	0000	—	———	0
						M8	8.5	14.8	1.9 to 2.1	100	91202A238	0000	2,000	91202A315	00000
						M10	10.7	18.1	2.0 to 2.4	100	91202A242	0000	2,000	91202A316	000000
						M12	12.7	21.1	2.3 to 2.7	100	91202A246	00000	2,000	91202A317	000000


						M14	14.7	24.1	2.8 to 3.2	100	91202A250	00000	2,000	91202A318	000000
						M16	17.0	27.4	3.3 to 3.7	50	91202A253	00000	1,000	91202A319	000000
						M18	19.0	29.4	3.3 to 3.7	25	91202A112	0000	—	———	0
		M20				21.2	33.6	3.8 to 4.2	25	91202A257	00000	500	91202A321	000000
		M22	22.5			35.9	3.8 to 4.2	10	91202A113	0000	—	———	0
		M24	25.5			40.0	4.8 to 5.2	25	91202A261	00000	—	———	0
		M27	28.5			43.0	4.8 to 5.2	10	91202A114	00000	—	———	0
		M30	31.7			48.2	5.8 to 6.2	10	91202A263	00000	—	———	0
		M33	33.5			55.2	5.8 to 6.2	5	91202A115	00000	—	———	0
		M36	37.7			58.2	5.8 to 6.2	5	91202A265	00000	—	———	0


		M42	43.7			68.2	6.8 to 7.2	1	91202A116	0000	—	———	0
		M48	50.5			75.0	6.8 to 7.2	1	91202A117	00000	—	———	0


		Zinc-Yellow-Chromate-Plated Steel



						M3	3.4	6.2	0.7 to 0.9	100	96982A151	0000	—	———	0


				M4	4.4	7.6	0.8 to 1.0	100	96982A152	0000	—	———	0
				M5	5.4	9.2	1.1 to 1.3	100	96982A153	0000	—	———	0
				M6	6.5	11.8	1.5 to 1.7	100	96982A154	0000	2,000	96982A211	00000
				M8	8.5	14.8	1.9 to 2.1	100	96982A155	0000	2,000	96982A212	000000
				M10	10.7	18.1	2.0 to 2.4	100	96982A156	00000	2,000	96982A213	000000
				M12	12.7	21.1	2.3 to 2.7	50	96982A157	0000	1,000	96982A214	000000
				M14	14.7	24.1	2.8 to 3.2	50	96982A158	00000	—	———	0
				M16	17.0	27.4	3.3 to 3.7	25	96982A159	0000	500	96982A215	000000
				M18	19.0	29.4	3.3 to 3.7	25	96982A161	00000	—	———	0
				M20	21.2	33.6	3.8 to 4.2	10	96982A162	0000	—	———	0


				M24	25.5	40.0	4.8 to 5.2	10	96982A163	0000	—	———	0
				M30	31.7	48.2	5.8 to 6.2	5	96982A164	00000	—	———	0


				Black-Oxide Steel



						M6	6.5	11.8	1.5 to 1.7	100	97093A214	00000	—	———	0


M8						8.5	14.8	1.9 to 2.1	100	97093A215	00000	—	———	0
M10	10.7					18.1	2.0 to 2.4	50	97093A216	0000	—	———	0
M16	17.0					27.4	3.3 to 3.7	25	97093A218	0000	—	———	0


Blue-Dyed Steel



						M3	3.4	6.2	0.7 to 0.9	100	93279A123	0000	—	———	0


						M4	4.5	7.6	0.8 to 1.0	100	93279A124	0000	—	———	0
						M5	5.4	9.2	1.1 to 1.3	100	93279A125	0000	—	———	0
						M6	6.2	12.1	2.0	100	93279A100	00000	—	———	0
						M6	6.5	11.8	1.5 to 1.7	50	93279A110	0000	—	———	0
						M8	8.2	15.2	2.5	100	93279A200	0000	—	———	0
						M8	8.5	14.8	1.9 to 2.1	50	93279A120	0000	—	———	0
						M10	10.2	18.0	2.9	50	93279A300	0000	—	———	0
						M10	10.7	18.1	2.0 to 2.4	25	93279A130	0000	—	———	0
						M12	12.3	21.7	3.8	100	93279A400	00000	—	———	0
						M12	12.7	21.1	2.3 to 2.7	25	93279A140	0000	—	———	0


						M16	16.4	27.9	4.8	25	93279A500	00000	—	———	0
						M16	17.0	27.4	3.3 to 3.7	25	93279A150	00000	—	———	0
						M20	20.5	33.8	5.7	10	93279A600	0000	—	———	0
						M20	21.2	33.6	3.8 to 4.2	10	93279A160	0000	—	———	0
						M24	24.5	40.7	7.2	10	93279A700	00000	—	———	0


						Steel



								M2	2.4	4.4	0.4 to 0.6	100	91169A050	0000	—	———	0


		M2.5	2.9					5.1	0.5 to 0.7	100	91169A070	0000	—	———	0
		M3	3.4					6.2	0.7 to 0.9	100	91169A150	0000	—	———	0
		M3.5	3.9					6.7	0.7 to 0.9	100	91169A155	0000	—	———	0
		M4	4.4					7.6	0.8 to 1.0	100	91169A160	0000	—	———	0
		M5	5.4					9.2	1.1 to 1.3	100	91169A170	0000	—	———	0
		M6	6.5					11.8	1.5 to 1.7	100	91169A180	0000	—	———	0
		M8	8.5					14.8	1.9 to 2.1	100	91169A200	0000	—	———	0
		M10	10.7					18.1	2.0 to 2.4	100	91169A210	0000	—	———	0
		M12	12.7					21.1	2.3 to 2.7	100	91169A214	00000	—	———	0
		M14	14.7					24.1	2.8 to 3.2	100	91169A220	00000	—	———	0


		M16	17.0					27.4	3.3 to 3.7	50	91169A240	00000	—	———	0
		M18	19.0					29.4	3.3 to 3.7	50	91169A242	00000	—	———	0
		M20	21.2					33.6	3.8 to 4.2	25	91169A245	00000	—	———	0
		M24	25.5					40.0	4.8 to 5.2	25	91169A248	00000	—	———	0
		M30	31.7					48.2	5.8 to 6.2	5	91169A244	00000	—	———	0
		M36	37.7					58.2	5.8 to 6.2	1	91169A249	0000	—	———	0


		Corrosion-Resistant Galvanized Steel



				M6	6.5			11.8	1.5 to 1.7	50	91169A310	00000	—	———	0


				M8	8.5			14.8	1.9 to 2.1	50	91169A320	00000	—	———	0
				M10	10.7			18.1	2.0 to 2.4	50	91169A330	00000	—	———	0
				M12	12.7			21.1	2.3 to 2.7	25	91169A340	00000	—	———	0
				M16	17.0			27.4	3.3 to 3.7	10	91169A350	0000	—	———	0
				M20	21.2			33.6	3.8 to 4.2	1	91169A360	0000	—	———	0


Highly Corrosion-Resistant Zinc-Flake-Coated Steel



				M6	6.5			11.8	1.5 to 1.7	25	90491A101	0000	—	———	0


				M8	8.5			14.8	1.9 to 2.1	25	90491A102	00000	—	———	0
				M10	10.7			18.1	2.0 to 2.4	25	90491A103	00000	—	———	0


				Highly Corrosion-Resistant Silicon Bronze



								M3	3.4	6.2	0.7 to 0.9	100	97093A201	00000	—	———	0


								M4	4.4	7.6	0.8 to 1.0	100	97093A202	00000	—	———	0
								M5	5.4	9.2	1.1 to 1.3	100	97093A203	00000	—	———	0
								M6	6.5	11.8	1.5 to 1.7	50	97093A204	00000	—	———	0
								M8	8.5	14.8	1.9 to 2.1	25	97093A205	00000	—	———	0
								M10	10.7	18.1	2.0 to 2.4	10	97093A206	0000	—	———	0

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	Container Type		Each
18-8 Stainless Steel



	755	For M3 to M20 Screw Sizes	Plastic Box	91170A409	0000000


	Steel



			755	For M3 to M20 Screw Sizes	Plastic Box	91170A109	00000

Countersunk Tooth Lock Washers

These washers grip flat- and oval-head countersunk screws, so you get a secure hold without overtightening. They resist loosening in applications with constant motion, such as conveyors. Tooth lock washers typically can't be reused because the teeth often get bent when tightened.

External Tooth

Teeth on the outside edge bite into both the screw head and the mating surface to lock the assembly in place.

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

DIN 6798—Best for slightly bumpy or irregular surfaces because the teeth are angled to make even contact with the material.

	ID, mm	OD, mm	Thk., mm	Countersink Angle	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M3	3.2	6.0	0.2 to 0.3	90°	DIN 6798	100	4340N111	000000


	M4	4.3	8.0	0.2 to 0.3	90°	DIN 6798	100	4340N112	00000
	M5	5.3	9.8	0.3 to 0.4	90°	DIN 6798	50	4340N113	00000
	M6	6.4	11.8	0.4 to 0.5	90°	DIN 6798	50	4340N114	00000
	M8	8.4	15.3	0.4 to 0.5	90°	DIN 6798	50	4340N115	00000
	M10	10.5	19.0	0.5 to 0.6	90°	DIN 6798	25	4340N116	0000
	M12	13.0	23.0	0.5 to 0.6	90°	DIN 6798	25	4340N117	00000

Wave Spring Lock Washers

The wavy shape flexes like a spring to keep nuts and screws secure on slightly uneven surfaces. These washers add a small amount of tension to stop fasteners from backing out due to mild vibration. While they don't hold as well as other lock washers, they do grip slightly better than curved washers. They work best in electrical panels, light fixtures, and other light duty assemblies. Since these washers hold their shape when untightened, you can reuse them a handful of times without losing strength.

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

DIN 128B—These washers have split ends that bite into your material surface for a tighter hold than other wave washers.

	No. of Waves	ID, mm	OD, mm	Thk., mm	Overall Ht., mm	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M4	1	4.4	7.6	0.7	1.4	DIN 128B	50	97093A174	00000


	M5	1	5.4	9.2	0.9	1.7	DIN 128B	25	97093A175	0000
	M6	1	6.5	11.8	1.2	2.2	DIN 128B	25	97093A176	0000
	M8	1	8.5	14.8	1.5	2.7	DIN 128B	25	97093A177	0000
	M10	1	10.7	18.1	1.7	3.1	DIN 128B	25	97093A178	00000
	M12	1	12.7	21.1	1.9	3.6	DIN 128B	10	97093A179	0000
	M16	1	17.0	27.4	2.6	5.1	DIN 128B	1	97093A182	0000


	Zinc-Plated Steel



			M3	1	3.1	6.2	0.6	1.1	DIN 128B	100	97093A155	0000


			M4	1	4.1	7.6	0.7	1.2	DIN 128B	100	97093A156	0000
			M5	1	5.1	9.2	0.9	1.5	DIN 128B	100	97093A157	0000
			M6	1	6.1	11.8	1.2	2.0	DIN 128B	100	97093A158	0000
			M8	1	8.1	14.8	1.5	2.5	DIN 128B	100	97093A159	00000
			M10	1	10.2	18.1	1.7	2.9	DIN 128B	50	97093A161	00000
			M12	1	12.2	21.1	2.0	3.4	DIN 128B	25	97093A162	0000
			M14	1	14.2	24.1	2.4	3.9	DIN 128B	25	97093A163	00000
			M16	1	16.2	27.4	2.7	4.5	DIN 128B	25	97093A164	00000
			M18	1	18.2	29.4	2.7	4.5	DIN 128B	10	97093A165	0000
			M22	1	22.5	35.9	3.0	5.1	DIN 128B	5	97093A167	0000


			M24	1	24.5	40.0	3.8	6.5	DIN 128B	5	97093A168	0000

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.

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—Best for dry environments since moisture will cause these washers to rust. They have a dark, matte appearance.

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



		M3	3.4	5.6	0.9 to 1.1	100	91111A118	00000


		M3.5	3.9	6.1	0.9 to 1.1	100	91111A119	0000
		M4	4.4	7.0	1.1 to 1.3	100	91111A121	0000
		M5	5.4	8.8	1.5 to 1.7	100	91111A124	0000
		M6	6.5	9.9	1.5 to 1.7	100	91111A129	0000
		M8	8.5	12.7	1.9 to 2.1	100	91111A132	00000
		M10	10.7	16.0	2.3 to 2.7	100	91111A135	00000
		M12	12.7	18.0	2.3 to 2.7	50	91111A138	00000
		M14	14.7	21.1	2.8 to 3.2	10	91111A141	0000
		M16	17.0	24.4	3.3 to 3.7	10	91111A143	0000
		M18	19.0	26.4	3.3 to 3.7	10	91111A145	0000


		M20	21.2	30.6	4.3 to 4.7	10	91111A147	0000
		M22	23.5	32.9	4.3 to 4.7	5	91111A149	00000
		M24	25.5	35.9	4.8 to 5.2	5	91111A151	0000
		M30	31.7	44.1	5.8 to 6.2	1	91111A155	00000


		Highly Corrosion-Resistant 316 Stainless Steel



				M3	3.4	5.6	0.9 to 1.1	100	94241A510	0000


				M4	4.4	7.0	1.1 to 1.3	100	94241A520	0000
				M5	5.4	8.8	1.5 to 1.7	100	94241A530	0000
				M6	6.5	9.9	1.5 to 1.7	100	94241A540	0000
				M8	8.5	12.7	1.9 to 2.1	50	94241A550	0000
				M10	10.7	16.0	2.3 to 2.7	50	94241A560	00000
				M12	12.7	18.0	2.3 to 2.7	25	94241A570	0000
				M14	14.7	21.1	2.8 to 3.2	10	94241A580	0000
				M16	17.0	24.4	3.3 to 3.7	10	94241A590	0000
				M18	19.0	26.4	3.3 to 3.7	10	94241A610	0000
				M20	21.2	30.6	4.3 to 4.7	1	94241A620	0000


				M22	23.5	32.9	4.3 to 4.7	1	94241A630	0000
				M24	25.5	35.9	4.8 to 5.2	1	94241A640	0000
				M30	31.7	44.1	5.8 to 6.2	1	94241A650	0000


				Zinc-Plated Steel



						M3	3.4	5.6	0.9 to 1.1	100	93837A110	0000


						M4	4.4	7.0	1.1 to 1.3	100	93837A120	0000
						M5	5.4	8.8	1.5 to 1.7	100	93837A130	0000
						M6	6.5	9.9	1.5 to 1.7	100	93837A140	0000
						M8	8.5	12.7	1.9 to 2.1	100	93837A230	0000
						M10	10.7	16.0	2.3 to 2.7	100	93837A150	00000
						M12	12.7	18.0	2.3 to 2.7	100	93837A240	00000
						M14	14.7	21.1	2.8 to 3.2	50	93837A250	0000
						M16	17.0	24.4	3.3 to 3.7	25	93837A160	0000
						M18	19.0	26.4	3.3 to 3.7	25	93837A170	00000
M20						21.2	30.6	4.3 to 4.7	10	93837A180	0000


M24	25.5					35.9	4.8 to 5.2	10	93837A190	0000
M27	28.5					38.9	4.8 to 5.2	5	93837A260	0000
M30	31.7					44.1	5.8 to 6.2	5	93837A210	00000
M36	37.7					52.2	6.7 to 7.3	1	93837A220	0000


Zinc-Yellow-Chromate-Plated Steel



						M4	4.1	7.0	1.1 to 1.3	100	93837A310	0000


						M5	5.1	8.8	1.5 to 1.7	25	93837A320	00000
						M6	6.1	9.9	1.5 to 1.7	100	93837A330	0000
						M8	8.1	12.7	1.9 to 2.1	100	93837A340	0000
						M10	10.2	16.0	2.3 to 2.7	100	93837A350	00000
						M12	12.2	18.0	2.3 to 2.7	100	93837A360	00000
						M16	16.2	24.4	3.3 to 3.7	25	93837A370	00000


						Black-Oxide Steel



			M3				3.4	5.6	0.9 to 1.1	100	91190A510	0000


			M3.5				3.9	6.1	0.9 to 1.1	100	91190A515	0000
			M4				4.4	7.0	1.1 to 1.3	100	91190A520	0000
			M5				5.4	8.8	1.5 to 1.7	100	91190A530	0000
			M6				6.5	9.9	1.5 to 1.7	100	91190A540	0000
			M8				8.5	12.7	1.9 to 2.1	100	91190A550	0000
			M10				10.7	16.0	2.3 to 2.7	100	91190A560	00000
			M12				12.7	18.0	2.3 to 2.7	100	91190A570	00000
			M14				14.7	21.1	2.8 to 3.2	100	91190A580	00000
			M16				17.0	24.4	3.3 to 3.7	50	91190A590	00000
			M18				19.0	26.4	3.3 to 3.7	25	91190A600	00000


			M20				21.2	30.6	4.3 to 4.7	25	91190A610	00000
			M22				23.5	32.9	4.3 to 4.7	10	91190A620	0000
			M24				25.5	35.9	4.8 to 5.2	10	91190A630	0000
			M27				28.5	38.9	4.8 to 5.2	5	91190A650	0000
			M30				31.7	44.1	5.8 to 6.2	5	91190A670	0000
			M36				37.7	52.2	6.7 to 7.3	1	91190A690	0000
			M42				43.7	60.2	7.7 to 8.3	1	91190A660	00000
			M48	50.5			67.0	7.7 to 8.3	1	91190A640	00000