Metric Countersunk Washers

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Washer Type

Countersunk

System of Measurement

Screw Size

Material

Overall Height

Countersink Angle

Thickness

Finish

Color

DFARS Specialty Metals

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Export Control Classification Number (ECCN)

REACH

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Compliant with Exemptions

Hardness

Specifications Met

Tooth Location

Sleeve Height

Sleeve OD

Performance

Electrically Insulating

Maximum Temperature

Less than 250° F

Minimum Temperature

-49° F to 0° F

Certificate Type

Material Certificate with Traceable Lot Number

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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	000000000	00000
	M4	4.3	16	3.7	90°	-40 to 180	Black , White	25	000000000	0000
	M5	5.2	18	3.8	90°	-40 to 180	Black , White	10	000000000	0000
	M6	6.4	22	4.5	90°	-40 to 180	Black , White	10	000000000	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	000000000	000000
	M3	3.2	10.0	1.8	90°	—	—	10	000000000	0000
	M4	4.3	14.0	2.3	90°	—	—	10	000000000	0000
	M5	5.3	16.0	2.8	90°	—	—	5	000000000	0000
	M6	6.4	18.0	3.3	90°	—	—	5	000000000	0000
	M8	8.4	25.0	4.8	90°	—	—	1	000000000	0000
	M10	10.5	30.0	6.5	90°	—	—	1	000000000	0000

	Nickel-Plated Steel


			M3	3.2	10.0	1.8	90°	—	—	5	000000000	0000
			M5	5.3	16.0	2.8	90°	—	—	5	000000000	00000
			M6	6.4	18.0	3.3	90°	—	—	5	000000000	00000
			M8	8.4	25.0	4.8	90°	—	—	5	000000000	00000

			Nickel-Plated Brass


					M3	4.1	9.0	1.8	90°	—	—	25	000000000	0000
					M4	6.0	13.0	2.3	90°	—	—	25	000000000	00000
					M5	7.0	15.0	2.5	90°	—	—	10	000000000	0000
					M6	8.0	16.0	3.2	90°	—	—	10	000000000	0000

					Zinc-Plated Steel


							M2.5	2.7	9.0	1.6	90°	—	—	25	000000000	00000
							M3	3.2	10.0	1.8	90°	—	—	25	000000000	0000
							M4	4.3	14.0	2.3	90°	—	—	25	000000000	00000
							M5	5.3	16.0	2.8	90°	—	—	25	000000000	00000
							M6	6.4	18.0	3.3	90°	—	—	10	000000000	0000
							M8	8.4	25.0	4.8	90°	—	—	5	000000000	0000
							M10	10.5	30.0	6.5	90°	—	—	1	000000000	0000

							Chrome-Plated Steel


									M2.5	2.7	9.0	1.6	90°	—	—	1	000000000	0000
									M3	3.2	10.0	1.8	90°	—	—	1	000000000	0000
									M4	4.3	14.0	2.3	90°	—	—	1	000000000	0000
									M5	5.3	16.0	2.8	90°	—	—	1	000000000	0000
									M6	6.4	18.0	3.3	90°	—	—	1	000000000	0000
									M8	8.4	25.0	4.8	90°	—	—	1	000000000	0000

									Aluminum


											M3	3.2	10.0	1.8	90°	—	—	10	000000000	0000
											M4	4.3	14.0	2.3	90°	—	—	10	000000000	00000
											M5	5.3	16.0	2.8	90°	—	—	10	000000000	00000
											M6	6.4	18.0	3.3	90°	—	—	10	000000000	00000
											M8	8.4	25.0	4.8	90°	—	—	5	000000000	00000

											Nylon


													M3	3	9.2	1.9	90°	-40 to 180	Black , Off-White	25	000000000	0000
													M4	4.3	11.9	3	90°	-40 to 180	Black , Off-White	25	000000000	0000
													M5	5.3	15.3	3.5	90°	-40 to 180	Black , Off-White	25	000000000	0000
													M6	6.3	17	4.5	90°	-40 to 180	Black , Off-White	10	000000000	0000
													M8	8	22.3	5.9	90°	-40 to 180	Black , Off-White	10	000000000	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	000000000	00000
	M3	3.2	12.0	2.2 to 2.8	100°	1	000000000	0000
	M4	4.3	16.0	2.7 to 3.3	90°	1	000000000	0000
	M4	4.3	16.0	2.7 to 3.3	100°	1	000000000	0000
	M5	5.3	22.0	3.2 to 3.8	90°	1	000000000	0000
	M5	5.3	22.0	3.2 to 3.8	100°	1	000000000	0000
	M6	6.4	32.0	3.7 to 4.3	90°	1	000000000	00000
	M6	6.4	32.0	3.7 to 4.3	100°	1	000000000	00000
	M8	8.4	32.0	4.5 to 5.1	90°	1	000000000	00000

	316 Stainless Steel


			M3	3.2	12.0	2.2 to 2.8	90°	1	0000000	0000
			M3	3.2	12.0	2.2 to 2.8	100°	1	0000000	0000
			M4	4.3	16.0	2.7 to 3.3	90°	1	0000000	0000
			M4	4.3	16.0	2.7 to 3.3	100°	1	0000000	0000
			M5	5.3	22.0	3.2 to 3.8	90°	1	0000000	0000
			M5	5.3	22.0	3.2 to 3.8	100°	1	0000000	00000
			M6	6.4	32.0	3.7 to 4.3	90°	1	0000000	00000
			M6	6.4	32.0	3.7 to 4.3	100°	1	0000000	00000
			M8	8.4	32.0	4.5 to 5.1	90°	1	0000000	00000

			Black-Oxide Steel


					M3	3.2	12.0	2.2 to 2.8	90°	5	000000000	0000
					M3	3.2	12.0	2.2 to 2.8	100°	5	000000000	0000
					M4	4.3	16.0	2.7 to 3.3	90°	5	000000000	0000
					M4	4.3	16.0	2.7 to 3.3	100°	5	000000000	0000
					M5	5.3	22.0	3.2 to 3.8	90°	5	000000000	00000
					M5	5.3	22.0	3.2 to 3.8	100°	1	000000000	0000
					M6	6.4	32.0	3.7 to 4.3	90°	1	000000000	0000
					M6	6.4	32.0	3.7 to 4.3	100°	1	000000000	0000
					M8	8.4	32.0	4.5 to 5.1	90°	1	000000000	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	00000000	000000
	M4	4.3	8.0	0.2 to 0.3	90°	DIN 6798	100	00000000	00000
	M5	5.3	9.8	0.3 to 0.4	90°	DIN 6798	50	00000000	00000
	M6	6.4	11.8	0.4 to 0.5	90°	DIN 6798	50	00000000	0000
	M8	8.4	15.3	0.4 to 0.5	90°	DIN 6798	50	00000000	00000
	M10	10.5	19.0	0.5 to 0.6	90°	DIN 6798	25	00000000	0000
	M12	13.0	23.0	0.5 to 0.6	90°	DIN 6798	25	00000000	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	000000000	00000
		M5	1.700	6.900	5.100	12.400	4.500	90°	-40	180	White	10	000000000	0000
		M6	1.700	8.000	6.000	12.800	5.000	90°	-40	180	White	10	000000000	0000
		M8	1.600	9.900	8.100	18.600	6.000	90°	-40	180	White	10	000000000	0000
		M10	1.500	11.900	10.100	22.800	7.000	90°	-40	180	White	10	000000000	0000
		M12	1.900	13.000	12.100	27.500	8.500	90°	-40	180	White	10	000000000	0000