Metric External Tooth Lock Washers

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129 Products

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.

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.

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

Bearing Spring Lock Washers for Slotted Bearing Nuts


	For Chamfered Nuts

Designed for use with bearing nuts, these lock washers have a conical shape that presses like a spring against bearings, bushings, gears, and pulleys to hold them in place on your threaded shaft or spindle. They also have an inner tab that sits in the shaft or spindle’s keyway to prevent the nut from loosening.

Steel—Steel washers are strong and flexible.

External Tooth—Washers with external teeth grip components using their teeth, in addition to spring tension.

DIN 5406—DIN 462 and DIN 5406 washers meet international standards for lock washer dimensions. Pair DIN 462 washers with DIN 1804 bearing nuts, and DIN 5406 washers with DIN 981 bearing nuts.

					Tab, mm
	For Screw Size	ID, mm	OD, mm	Thk., mm	Wd.	Dp.	Overall Ht., mm	Tooth Location	Hardness	Specs. Met	For Bearing Nut Specs. Met		Each
For Chamfered Nuts







				Steel

				M10	10.000	21.000	1.000	3.000	1.500	3.000	External	Not Rated	DIN 5406	DIN 981	90391A111	00000


				M12	12.000	25.000	1.000	3.000	1.500	3.000	External	Not Rated	DIN 5406	DIN 981	90391A112	0000
				M15	15.000	28.000	1.000	4.000	1.500	2.500	External	Not Rated	DIN 5406	DIN 981	90391A113	0000
				M17	17.000	32.000	1.000	4.000	1.500	3.000	External	Not Rated	DIN 5406	DIN 981	90391A114	0000
				M20	20.000	36.000	1.000	4.000	1.500	3.500	External	Not Rated	DIN 5406	DIN 981	90391A115	0000
				M25	25.000	42.000	1.250	5.000	2.000	3.500	External	Not Rated	DIN 5406	DIN 981	90391A116	0000
				M30	30.000	49.000	1.250	5.000	2.500	4.000	External	Not Rated	DIN 5406	DIN 981	90391A117	0000
				M35	35.000	57.000	1.250	6.000	2.500	4.500	External	Not Rated	DIN 5406	DIN 981	90391A118	0000
				M40	40.000	62.000	1.250	6.000	2.500	4.000	External	Not Rated	DIN 5406	DIN 981	90391A119	0000
				M45	45.000	69.000	1.250	6.000	2.500	4.500	External	Not Rated	DIN 5406	DIN 981	90391A121	0000
				M50	50.000	74.000	1.250	6.000	2.500	4.500	External	Not Rated	DIN 5406	DIN 981	90391A122	0000


				M55	55.000	81.000	1.250	8.000	2.500	4.500	External	Not Rated	DIN 5406	DIN 981	90391A123	0000
				M60	60.000	86.000	1.500	8.000	2.500	4.500	External	Not Rated	DIN 5406	DIN 981	90391A124	0000
				M65	65.000	92.000	1.500	8.000	2.500	4.500	External	Not Rated	DIN 5406	DIN 981	90391A125	0000
				M70	70.000	98.000	1.500	8.000	3.500	4.500	External	Not Rated	DIN 5406	DIN 981	90391A126	0000
				M75	75.000	104.000	1.500	8.000	3.500	5.000	External	Not Rated	DIN 5406	DIN 981	90391A127	0000
				M80	80.000	112.000	1.750	10.000	3.500	5.500	External	Not Rated	DIN 5406	DIN 981	90391A128	0000
				M85	85.000	119.000	1.750	10.000	3.500	5.500	External	Not Rated	DIN 5406	DIN 981	90391A129	00000
				M90	90.000	126.000	1.750	10.000	3.500	6.000	External	Not Rated	DIN 5406	DIN 981	90391A131	00000
				M95	95.000	133.000	1.750	10.000	3.500	6.500	External	Not Rated	DIN 5406	DIN 981	90391A132	00000
				M100	100.000	142.000	1.750	12.000	3.500	7.000	External	Not Rated	DIN 5406	DIN 981	90391A133	0000


				M105	105.000	145.000	1.750	12.000	4.500	6.000	External	Not Rated	DIN 5406	DIN 981	90391A134	0000
				M110	110.000	154.000	1.750	12.000	4.500	6.500	External	Not Rated	DIN 5406	DIN 981	90391A135	00000
				M115	115.000	159.000	2.000	12.000	4.500	7.000	External	Not Rated	DIN 5406	DIN 981	90391A136	00000
				M120	120.000	164.000	2.000	14.000	5.000	8.000	External	Not Rated	DIN 5406	DIN 981	90391A137	00000
				M125	125.000	170.000	2.000	14.000	5.000	7.000	External	Not Rated	DIN 5406	DIN 981	90391A138	00000
				M130	130.000	175.000	2.000	14.000	5.000	8.000	External	Not Rated	DIN 5406	DIN 981	90391A139	00000
				M135	135.000	185.000	2.000	14.000	5.000	8.000	External	Not Rated	DIN 5406	DIN 981	90391A141	00000
				M140	140.000	192.000	2.000	16.000	5.000	9.500	External	Not Rated	DIN 5406	DIN 981	90391A142	00000
				M145	145.000	202.000	2.000	16.000	5.000	9.000	External	Not Rated	DIN 5406	DIN 981	90391A143	00000
				M150	150.000	205.000	2.000	16.000	5.000	10.000	External	Not Rated	DIN 5406	DIN 981	90391A144	00000


				M160	160.000	217.000	2.500	18.000	6.000	10.500	External	Not Rated	DIN 5406	DIN 981	90391A145	000000
				M170	170.000	232.000	2.500	18.000	6.000	11.500	External	Not Rated	DIN 5406	DIN 981	90391A146	000000
				M180	180.000	242.000	2.500	20.000	6.000	11.500	External	Not Rated	DIN 5406	DIN 981	90391A147	000000
				M220	220.000	292.000	3.000	24.000	7.000	13.000	External	Not Rated	DIN 5406	DIN 981	90391A148	000000

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

Locknuts with External-Tooth Lock Washer

To save on assembly time, these locknuts combine a hex nut with a free-spinning lock washer, so you can twist them into place by hand. Once the nut is against your material surface, tighten it down with a wrench or socket to get the teeth to bite. Although these nuts install more quickly than nylon-insert locknuts, they don't hold up as well against vibration and can mar your material. As long as the washer stays intact, you can reuse them. Also known as Keps and K-lock nuts.

Medium-Strength Steel

These Grade 5 or Class 8 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Black-Zinc-Plated Steel—The dark zinc plating withstands occasional exposure to moisture while creating a finished look.

	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Washer OD, mm	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M3 × 0.5 mm	5.5	3.3	Class 8	7.1	100	93825A110	000000


	M4 × 0.7 mm	7	4.1	Class 8	8.5	100	93825A120	00000
	M5 × 0.8 mm	8	5.2	Class 8	9.5	100	93825A130	00000
	M6 × 1 mm	10	6.2	Class 8	12	100	93825A140	00000
	M8 × 1.25 mm	13	8.5	Class 8	15.5	25	93825A160	0000
	M10 × 1.5 mm	17	9.7	Class 8	20.1	10	93825A170	00000


	Black-Zinc-Plated Steel



			M3 × 0.5 mm	5.5	3	Class 8	7.1	100	93825A210	00000


			M4 × 0.7 mm	7	4.1	Class 8	8.5	100	93825A220	00000
			M5 × 0.8 mm	8	5.2	Class 8	9.5	100	93825A230	00000
			M6 × 1 mm	10	6.2	Class 8	12	50	93825A240	00000
			M8 × 1.25 mm	13	8.5	Class 8	15.5	25	93825A250	00000
			M10 × 1.5 mm	17	9.7	Class 8	20.1	10	93825A260	00000

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these locknuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

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

	Wd., mm	Ht., mm	Washer OD, mm	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M3 × 0.5 mm	5.5	3.3	6.5	50	90923A216	000000


	M4 × 0.7 mm	7	4.1	8.2	50	90923A219	00000
	M5 × 0.8 mm	8	5.2	9.5	25	90923A222	0000
	M6 × 1 mm	10	6.2	11.5	25	90923A227	0000
	M8 × 1.25 mm	13	8.5	15.1	5	90923A241	0000
	M10 × 1.5 mm	17	9.7	19.2	5	90923A282	00000


	Black-Oxide 18-8 Stainless Steel



			M3 × 0.5 mm	5.5	3.3	6.5	25	90923A231	0000


			M4 × 0.7 mm	7	4.1	8.2	25	90923A232	00000
			M5 × 0.8 mm	8	5.2	9.5	25	90923A233	00000
			M6 × 1 mm	10	6.2	11.5	25	90923A234	00000