Metric Countersunk Washers

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Countersunk

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EAR99

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Electrically Insulating

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82 Products

Finishing Washers

Flat and oval head screws sit flush within these washers for a neat, finished appearance.

Rounded Face Finishing Washers

Nylon—Nylon washers are good electrical insulators. Exposure to moisture may cause these nylon washers to expand.

	ID, mm	OD, mm	Overall Ht., mm	Countersink Angle	Temp. Range, ° F	Choose a Color	Pkg. Qty.		Pkg.
Nylon



	M3	3.2	14	2.9	90°	-40 to 180	Black, White	25	95481A171	00000


	M4	4.3	16	3.7	90°	-40 to 180	Black, White	25	95481A181	0000
	M5	5.2	18	3.8	90°	-40 to 180	Black, White	10	95481A191	0000
	M6	6.4	22	4.5	90°	-40 to 180	Black, White	10	95481A221	0000

Other Finishing Washers

Image of Product. Front orientation. Finishing Washers.

18-8 Stainless Steel—18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.

Nickel-Plated Steel—Nickel-plated steel washers have excellent corrosion resistance and a decorative finish.

Nickel-Plated Brass—Black-zinc- and nickel-plated brass washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive. They have a decorative finish.

Zinc-Plated Steel and Chrome-Plated Steel—Zinc- and chrome-plated steel washers are corrosion resistant in wet environments.

Aluminum—Aluminum washers are lightweight and corrosion resistant in wet environments.

Nylon—Nylon washers are good electrical insulators. Exposure to moisture may cause these nylon washers to expand.

	ID, mm	OD, mm	Overall Ht., mm	Countersink Angle	Temp. Range, ° F	Choose a Color	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M2.5	2.7	9.0	1.6	90°	—	—	10	98472A111	000000


	M3	3.2	10.0	1.8	90°	—	—	10	98472A200	0000
	M4	4.3	14.0	2.3	90°	—	—	10	98472A250	00000
	M5	5.3	16.0	2.8	90°	—	—	5	98472A300	0000
	M6	6.4	18.0	3.3	90°	—	—	5	98472A350	0000
	M8	8.4	25.0	4.8	90°	—	—	1	98472A112	0000
	M10	10.5	30.0	6.5	90°	—	—	1	98472A113	0000


	Nickel-Plated Steel



			M3	3.2	10.0	1.8	90°	—	—	5	92355A140	0000


			M5	5.3	16.0	2.8	90°	—	—	5	92355A110	00000
			M6	6.4	18.0	3.3	90°	—	—	5	92355A120	00000
			M8	8.4	25.0	4.8	90°	—	—	5	92355A130	00000


			Nickel-Plated Brass



					M3	4.1	9.0	1.8	90°	—	—	25	99435A500	0000


					M4	6.0	13.0	2.3	90°	—	—	25	99435A600	00000
					M5	7.0	15.0	2.5	90°	—	—	10	99435A650	0000
					M6	8.0	16.0	3.2	90°	—	—	10	99435A700	0000


					Zinc-Plated Steel



							M2.5	2.7	9.0	1.6	90°	—	—	25	98424A100	00000


							M3	3.2	10.0	1.8	90°	—	—	25	98424A200	0000
							M4	4.3	14.0	2.3	90°	—	—	25	98424A250	00000
							M5	5.3	16.0	2.8	90°	—	—	25	98424A300	00000
							M6	6.4	18.0	3.3	90°	—	—	10	98424A350	0000
							M8	8.4	25.0	4.8	90°	—	—	5	98424A400	0000
							M10	10.5	30.0	6.5	90°	—	—	1	98424A111	0000


							Chrome-Plated Steel



									M2.5	2.7	9.0	1.6	90°	—	—	1	97280A117	0000


									M3	3.2	10.0	1.8	90°	—	—	1	97280A118	0000
									M4	4.3	14.0	2.3	90°	—	—	1	97280A119	0000
									M5	5.3	16.0	2.8	90°	—	—	1	97280A121	0000
									M6	6.4	18.0	3.3	90°	—	—	1	97280A122	0000
M8									8.4	25.0	4.8	90°	—	—	1	97280A123	0000


Aluminum



									M3	3.2	10.0	1.8	90°	—	—	10	97280A124	00000


									M4	4.3	14.0	2.3	90°	—	—	10	97280A125	00000
									M5	5.3	16.0	2.8	90°	—	—	10	97280A126	00000
									M6	6.4	18.0	3.3	90°	—	—	10	97280A127	00000
									M8	8.4	25.0	4.8	90°	—	—	5	97280A128	00000


	Nylon



									M3	3	9.2	1.9	90°	-40 to 180	Black, Off-White	25	95481A121	0000


									M4	4.3	11.9	3	90°	-40 to 180	Black, Off-White	25	95481A131	0000
									M5	5.3	15.3	3.5	90°	-40 to 180	Black, Off-White	25	95481A141	0000
									M6	6.3	17	4.5	90°	-40 to 180	Black, Off-White	10	95481A151	0000
									M8	8	22.3	5.9	90°	-40 to 180	Black, Off-White	10	95481A161	0000

Heavy Duty Finishing Washers

Also known as dress washers, these are machined to be sturdier and provide a neater appearance than standard finishing washers. Flat and oval head screws sit flush within them.

18-8 Stainless Steel—18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.

316 Stainless Steel—316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.

Black-Oxide Steel—Black-oxide steel washers are mildly corrosion resistant in dry environments.

	ID, mm	OD, mm	Thk., mm	Countersink Angle	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M3	3.2	12.0	2.2 to 2.8	90°	1	92538A171	00000


	M3	3.2	12.0	2.2 to 2.8	100°	1	92538A461	0000
	M4	4.3	16.0	2.7 to 3.3	90°	1	92538A440	0000
	M4	4.3	16.0	2.7 to 3.3	100°	1	92538A464	0000
	M5	5.3	22.0	3.2 to 3.8	90°	1	92538A450	0000
	M5	5.3	22.0	3.2 to 3.8	100°	1	92538A508	0000
	M6	6.4	32.0	3.7 to 4.3	90°	1	92538A465	00000
	M6	6.4	32.0	3.7 to 4.3	100°	1	92538A870	00000
	M8	8.4	32.0	4.5 to 5.1	90°	1	92538A326	00000


	316 Stainless Steel



			M3	3.2	12.0	2.2 to 2.8	90°	1	3127N11	0000


			M3	3.2	12.0	2.2 to 2.8	100°	1	3127N16	0000
			M4	4.3	16.0	2.7 to 3.3	90°	1	3127N12	0000
			M4	4.3	16.0	2.7 to 3.3	100°	1	3127N17	0000
			M5	5.3	22.0	3.2 to 3.8	90°	1	3127N13	0000
			M5	5.3	22.0	3.2 to 3.8	100°	1	3127N18	00000
			M6	6.4	32.0	3.7 to 4.3	90°	1	3127N14	00000
			M6	6.4	32.0	3.7 to 4.3	100°	1	3127N19	00000
			M8	8.4	32.0	4.5 to 5.1	90°	1	3127N15	00000


			Black-Oxide Steel



					M3	3.2	12.0	2.2 to 2.8	90°	5	92908A576	0000


					M3	3.2	12.0	2.2 to 2.8	100°	5	92908A622	0000
					M4	4.3	16.0	2.7 to 3.3	90°	5	92908A240	0000
					M4	4.3	16.0	2.7 to 3.3	100°	5	92908A667	0000
					M5	5.3	22.0	3.2 to 3.8	90°	5	92908A250	00000
					M5	5.3	22.0	3.2 to 3.8	100°	1	92908A677	0000
					M6	6.4	32.0	3.7 to 4.3	90°	1	92908A265	0000
					M6	6.4	32.0	3.7 to 4.3	100°	1	92908A809	0000
					M8	8.4	32.0	4.5 to 5.1	90°	1	92908A588	00000

Countersunk Insulating Sleeve Washers

Flat- and oval-head screws sit flush within these insulating washers, so they won't stick out and snag on objects. Washers cover the screw head and a portion of the threads to block electrical current and prevent short circuits. They also extend the life of your assembly by preventing galvanic corrosion, which is when two different metals rust more quickly due to contact with each other.

Nylon—Our most versatile insulating washers, these block unwanted current in everything from switches and circuit breakers to control panels and electric motors.

		Sleeve, mm						Temp. Range, ° F
	For Screw Size	Ht.	OD	ID, mm	OD, mm	Overall Ht., mm	Countersink Angle	Min.	Max.	Color	Pkg. Qty.		Pkg.
Nylon



		M4	2.000	5.900	4.100	10.400	4.300	90°	-40	180	White	10	92354A110	00000


		M5	1.700	6.900	5.100	12.400	4.500	90°	-40	180	White	10	92354A120	0000
		M6	1.700	8.000	6.000	12.800	5.000	90°	-40	180	White	10	92354A130	0000
		M8	1.600	9.900	8.100	18.600	6.000	90°	-40	180	White	10	92354A140	0000
		M10	1.500	11.900	10.100	22.800	7.000	90°	-40	180	White	10	92354A150	0000
		M12	1.900	13.000	12.100	27.500	8.500	90°	-40	180	White	10	92354A160	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