Metric Countersunk Washers

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	Washer Type Washer Type	Show

Countersunk

	Washer Type Washer Type	Hide

	System of Measurement System of Measurement

Metric

	For Screw Size For Screw Size

M2.5

M10

M12

	OD OD

	ID ID

	Material Material

	Finish Finish

	Thickness Thickness

	Overall Height Overall Height

	Countersink Angle Countersink Angle

90°

100°

	Color Color

	Black
	Off-White
	White

	Hardness Hardness

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Tooth Location Tooth Location

	External

	Minimum Temperature Minimum Temperature

-49° to 0° F

	Maximum Temperature Maximum Temperature

Less than 250° F

	Specifications Met Specifications Met

DIN

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72 Products

About Washers

Washer

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

Zinc- and chrome-plated steel washers are corrosion resistant in wet environments.

Nickel-plated brass washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive. They have a decorative finish.

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

Aluminum washers are lightweight and corrosion resistant in wet environments.

For technical drawings and 3-D models, click on a part number.

Zinc-Plated Steel
For Screw Size	ID, mm	OD, mm	Overall Ht., mm	Countersink Angle	Pkg. Qty.		Pkg.
M2.5	2.7	9.0	1.6	90°	25	000000000	000000
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
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
18-8 Stainless Steel
M2.5	2.7	9.0	1.6	90°	10	000000000	00000
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
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

Plastic Countersunk Washers

Washer

Rounded-Face Washer

Plastic washers are good electrical insulators. Flat and oval head screws sit flush within these for a neat, finished appearance. Exposure to moisture may cause these nylon washers to expand.

For technical drawings and 3-D models, click on a part number.

Metric

					Temperature Range, °F
For Screw Size	ID, mm	OD, mm	Overall Ht., mm	Countersink Angle	Min.	Max.	Hardness	Choose a Color	Pkg. Qty.		Pkg.
Nylon Plastic
M3	3	9.2	1.9	90°	-40°	180°	Rockwell R120	Black, Off-White	25	000000000	00000
M4	4.3	11.9	3	90°	-40°	180°	Rockwell R120	Black, Off-White	25	000000000	0000
M5	5.3	15.3	3.5	90°	-40°	180°	Rockwell R120	Black, Off-White	25	000000000	0000
M6	6.3	17	4.5	90°	-40°	180°	Rockwell R120	Black, Off-White	10	000000000	0000
M8	8	22.3	5.9	90°	-40°	180°	Rockwell R120	Black, Off-White	10	000000000	0000
Nylon Plastic with Rounded Face
M3	3.2	14	2.9	90°	-40°	180°	Rockwell R120	Black, White	25	000000000	0000
M4	4.3	16	3.7	90°	-40°	180°	Rockwell R120	Black, White	25	000000000	0000
M5	5.2	18	3.8	90°	-40°	180°	Rockwell R120	Black, White	10	000000000	0000
M6	6.4	22	4.5	90°	-40°	180°	Rockwell R120	Black, White	10	000000000	0000

Metric Finishing Countersunk Washers

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

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

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

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

For technical drawings and 3-D models, click on a part number.

18-8 Stainless Steel
For Screw Size	ID, mm	OD, mm	Thick., mm	Countersink Angle	Hardness	Pkg. Qty.		Pkg.
M3	3.2	12.0	2.2-2.8	90°	Rockwell B83	1	000000000	00000
M3	3.2	12.0	2.2-2.8	100°	Rockwell B83	1	000000000	0000
M4	4.3	16.0	2.7-3.3	90°	Rockwell B83	1	000000000	0000
M4	4.3	16.0	2.7-3.3	100°	Rockwell B83	1	000000000	0000
M5	5.3	22.0	3.2-3.8	90°	Rockwell B83	1	000000000	0000
M5	5.3	22.0	3.2-3.8	100°	Rockwell B83	1	000000000	0000
M6	6.4	32.0	3.7-4.3	90°	Rockwell B83	1	000000000	00000
M6	6.4	32.0	3.7-4.3	100°	Rockwell B83	1	000000000	00000
M8	8.4	32.0	4.5-5.1	90°	Rockwell B83	1	000000000	00000
316 Stainless Steel
M3	3.2	12.0	2.2-2.8	90°	Rockwell B83	1	0000000	0000
M3	3.2	12.0	2.2-2.8	100°	Rockwell B83	1	0000000	0000
M4	4.3	16.0	2.7-3.3	90°	Rockwell B83	1	0000000	0000
M4	4.3	16.0	2.7-3.3	100°	Rockwell B83	1	0000000	0000
M5	5.3	22.0	3.2-3.8	90°	Rockwell B83	1	0000000	0000
M5	5.3	22.0	3.2-3.8	100°	Rockwell B83	1	0000000	00000
M6	6.4	32.0	3.7-4.3	90°	Rockwell B83	1	0000000	00000
M6	6.4	32.0	3.7-4.3	100°	Rockwell B83	1	0000000	00000
M8	8.4	32.0	4.5-5.1	90°	Rockwell B83	1	0000000	00000
Black-Oxide Steel
M3	3.2	12.0	2.2-2.8	90°	Rockwell 15N80	5	000000000	0000
M3	3.2	12.0	2.2-2.8	100°	Rockwell 15N80	5	000000000	0000
M4	4.3	16.0	2.7-3.3	90°	Rockwell 15N80	5	000000000	0000
M4	4.3	16.0	2.7-3.3	100°	Rockwell 15N80	5	000000000	0000
M5	5.3	22.0	3.2-3.8	90°	Rockwell 15N80	5	000000000	00000
M5	5.3	22.0	3.2-3.8	100°	Rockwell 15N80	1	000000000	0000
M6	6.4	32.0	3.7-4.3	90°	Rockwell 15N80	1	000000000	0000
M6	6.4	32.0	3.7-4.3	100°	Rockwell 15N80	1	000000000	0000
M8	8.4	32.0	4.5-5.1	90°	Rockwell 15N80	1	000000000	00000

Countersunk Tight-Grip External-Tooth Lock Washers

To keep 90° countersunk screws from loosening in vibration applications, the teeth on these washers bite further into the screw head and joint than standard external-tooth lock washers for a more secure hold. Made of zinc-plated steel, these washers resist corrosion in wet environments. All meet DIN dimensional standards.

For technical drawings and 3-D models, click on a part number.

Zinc-Plated Steel
For Screw Size	ID, mm	OD, mm	Thickness, mm	Countersink Angle	Hardness	Specifications Met	Pkg. Qty.		Pkg.
M3	3.2	6.0	0.15-0.25	90°	Rockwell C35	DIN 6798	100	00000000	00000
M4	4.3	8.0	0.20-0.30	90°	Rockwell C35	DIN 6798	100	00000000	0000
M5	5.3	9.8	0.25-0.35	90°	Rockwell C35	DIN 6798	50	00000000	0000
M6	6.4	11.8	0.35-0.45	90°	Rockwell C35	DIN 6798	50	00000000	0000
M8	8.4	15.3	0.35-0.45	90°	Rockwell C35	DIN 6798	50	00000000	0000
M10	10.5	19.0	0.45-0.55	90°	Rockwell C35	DIN 6798	25	00000000	0000
M12	13.0	23.0	0.45-0.55	90°	Rockwell C35	DIN 6798	25	00000000	0000