DIN 6798 Washers | McMaster-Carr

Filter by

System of Measurement

Screw Size

Tooth Location

Thickness

Washer Type

Material

Finish

RoHS

Performance

Countersink Angle

REACH

Hardness

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Exempt

Not Compliant

Certificate Type

Material Certificate with Traceable Lot Number

Forward

How can we improve?

Help me decide (beta)

26 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.

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	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M2	2.2	4.5	0.2 to 0.4	DIN 6798	100	91120A311	00000


	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 6798	100	91120A120	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 6798	100	91120A140	0000
	M6	6.4	11.0	0.6 to 0.8	DIN 6798	100	91120A160	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 6798	100	91120A200	00000
	M12	13.0	20.5	0.9 to 1.2	DIN 6798	50	91120A211	0000
	M16	17.0	26.0	1.0 to 1.4	DIN 6798	50	91120A235	00000
	M20	21.0	33.0	1.2 to 1.5	DIN 6798	10	91120A241	0000


	M24	25.0	38.0	1.4 to 1.6	DIN 6798	10	91120A245	0000


	Zinc-Plated Steel



			M3	3.2	6.0	0.4 to 0.5	DIN 6798	100	97985A720	0000


			M4	4.3	8.0	0.5 to 0.6	DIN 6798	100	97985A730	0000
			M5	5.3	10.0	0.6 to 0.7	DIN 6798	100	97985A740	0000
			M6	6.4	11.0	0.7 to 0.8	DIN 6798	100	97985A760	0000
			M8	8.4	14.0	0.8 to 0.9	DIN 6798	100	97985A780	0000
			M10	10.5	18.0	0.9 to 1.0	DIN 6798	50	97985A800	0000
			M12	13.0	20.5	1.0 to 1.2	DIN 6798	50	97985A810	0000

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