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About Washers
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Metric Countersunk Washers
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.
| For Screw Size | ID, mm | OD, mm | Overall Ht., mm | Countersink Angle | Pkg. Qty. | Pkg. | |
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 | 0000 |
| M5 | 5.3 | 16.0 | 2.8 | 90° | 25 | 000000000 | 0000 |
| 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 | 0000 |
| 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 | 0000 |
| 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 | 0000 |
| 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
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.
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 | 25 | 000000000 | 00000 | |
| M4 | 4.3 | 11.9 | 3 | 90° | -40° | 180° | Rockwell R120 | 25 | 000000000 | 0000 | |
| M5 | 5.3 | 15.3 | 3.5 | 90° | -40° | 180° | Rockwell R120 | 25 | 000000000 | 0000 | |
| M6 | 6.3 | 17 | 4.5 | 90° | -40° | 180° | Rockwell R120 | 10 | 000000000 | 0000 | |
| M8 | 8 | 22.3 | 5.9 | 90° | -40° | 180° | Rockwell R120 | 10 | 000000000 | 0000 | |
Nylon Plastic with Rounded Face | |||||||||||
| M3 | 3.2 | 14 | 2.9 | 90° | -40° | 180° | Rockwell R120 | 25 | 000000000 | 0000 | |
| M4 | 4.3 | 16 | 3.7 | 90° | -40° | 180° | Rockwell R120 | 25 | 000000000 | 0000 | |
| M5 | 5.2 | 18 | 3.8 | 90° | -40° | 180° | Rockwell R120 | 10 | 000000000 | 0000 | |
| M6 | 6.4 | 22 | 4.5 | 90° | -40° | 180° | Rockwell R120 | 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.
| For Screw Size | ID, mm | OD, mm | Thick., mm | Countersink Angle | Hardness | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 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 | 0000 |
| 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 |
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.
| For Screw Size | ID | OD | Thick. | Countersink Angle | Hardness | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 4 | 0.125" | 0.438" | 0.084"-0.104" | 82° | Rockwell B83 | 1 | 000000000 | 00000 |
| No. 4 | 0.125" | 0.438" | 0.084"-0.104" | 100° | Rockwell B83 | 1 | 000000000 | 0000 |
| No. 5 | 0.140" | 0.500" | 0.084"-0.104" | 100° | Rockwell B83 | 1 | 000000000 | 0000 |
| No. 5 | 0.140" | 0.500" | 0.094"-0.114" | 82° | Rockwell B83 | 1 | 000000000 | 0000 |
| No. 6 | 0.156" | 0.562" | 0.084"-0.104" | 100° | Rockwell B83 | 1 | 000000000 | 0000 |
| No. 6 | 0.156" | 0.562" | 0.097"-0.117" | 82° | Rockwell B83 | 1 | 000000000 | 0000 |
| No. 8 | 0.188" | 0.750" | 0.115"-0.135" | 82° | Rockwell B83 | 1 | 000000000 | 0000 |
| No. 8 | 0.188" | 0.750" | 0.115"-0.135" | 100° | Rockwell B83 | 1 | 000000000 | 0000 |
| No. 10 | 0.203" | 0.812" | 0.130"-0.151" | 100° | Rockwell B83 | 1 | 000000000 | 0000 |
| 1/4" | 0.281" | 1.250" | 0.271"-0.291" | 82° | Rockwell B83 | 1 | 000000000 | 00000 |
| 1/4" | 0.281" | 1.250" | 0.271"-0.291" | 100° | Rockwell B83 | 1 | 000000000 | 00000 |
| 5/16" | 0.344" | 1.250" | 0.198"-0.218" | 82° | Rockwell B83 | 1 | 000000000 | 00000 |
316 Stainless Steel | ||||||||
| No. 4 | 0.125" | 0.438" | 0.084"-0.104" | 82° | Rockwell B83 | 1 | 0000000 | 0000 |
| No. 4 | 0.125" | 0.438" | 0.084"-0.104" | 100° | Rockwell B83 | 1 | 0000000 | 0000 |
| No. 5 | 0.140" | 0.500" | 0.084"-0.104" | 100° | Rockwell B83 | 1 | 0000000 | 0000 |
| No. 5 | 0.140" | 0.500" | 0.094"-0.114" | 82° | Rockwell B83 | 1 | 0000000 | 0000 |
| No. 6 | 0.156" | 0.562" | 0.084"-0.104" | 100° | Rockwell B83 | 1 | 0000000 | 0000 |
| No. 6 | 0.156" | 0.562" | 0.097"-0.117" | 82° | Rockwell B83 | 1 | 0000000 | 0000 |
| No. 8 | 0.188" | 0.750" | 0.115"-0.135" | 82° | Rockwell B83 | 1 | 0000000 | 0000 |
| No. 8 | 0.188" | 0.750" | 0.115"-0.135" | 100° | Rockwell B83 | 1 | 0000000 | 0000 |
| No. 10 | 0.203" | 0.812" | 0.130"-0.151" | 82° | Rockwell B83 | 1 | 0000000 | 0000 |
| No. 10 | 0.203" | 0.812" | 0.130"-0.151" | 100° | Rockwell B83 | 1 | 0000000 | 0000 |
Black-Oxide Steel | ||||||||
| No. 4 | 0.125" | 0.438" | 0.084"-0.104" | 82° | Rockwell 15N80 | 5 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.438" | 0.084"-0.104" | 100° | Rockwell 15N80 | 5 | 000000000 | 0000 |
| No. 5 | 0.140" | 0.500" | 0.084"-0.104" | 100° | Rockwell 15N80 | 5 | 000000000 | 0000 |
| No. 5 | 0.140" | 0.500" | 0.094"-0.114" | 82° | Rockwell 15N80 | 5 | 000000000 | 0000 |
| No. 6 | 0.156" | 0.562" | 0.084"-0.104" | 100° | Rockwell 15N80 | 5 | 000000000 | 00000 |
| No. 6 | 0.156" | 0.562" | 0.097"-0.117" | 82° | Rockwell 15N80 | 5 | 000000000 | 0000 |
| No. 8 | 0.188" | 0.750" | 0.115"-0.135" | 100° | Rockwell 15N80 | 5 | 000000000 | 00000 |
| No. 10 | 0.203" | 0.812" | 0.130"-0.151" | 100° | Rockwell 15N80 | 1 | 000000000 | 0000 |
| No. 10 | 0.203" | 1.250" | 0.130"-0.151" | 100° | Rockwell 15N80 | 1 | 000000000 | 0000 |