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Taper | Plate | |||||
OD (mm) | Hole (mm) | Thickness (mm) | OD (mm) | Hole (mm) | Thickness (mm) | |
| 10 | 3.6(6.4) | 3 | 10 | 3.5(6.4) | 3 | |
| 13 | 3.6(6.4) | 3 | 12 | 5.5(10.9) | 3 | |
| 13 | 4.8(9) | 3.2 | 13 | 3.5(6.4) | 3 | |
| 16 | 6.7(13) | 3.5 | 13 | 4.7(8.3) | 3 | |
| 16 | 5.5(10.9) | 3.5 | 16 | 4.7(8.7) | 3 | |
| 18 | 5.5(10.9) | 3.5 | 16 | 5.5(10.9) | 3 | |
| 18 | 6.7(13) | 3.5 | 16 | 6.7(13) | 3.5 | |
| 20 | 8.7(17) | 5 | 18 | 6.7(13) | 4 | |
| 30 | 10.7(21) | 5 | 20 | 6.7(13) | 4 | |
| 25 | 8.7(16.9) | 5 | ||||
| 30 | 10.8(21.3) | 6 | ||||
Countersunk washer, a specialized type of Fasteners, Its feature lies in having a recessed hole, which is used for installing countersunk screws or bolts. This unique structure enables the head of the fastener to be flush with the surface of the washer.
They are made of durable materials (such as stainless steel and carbon steel), and perform exceptionally well in terms of pressure distribution, prevention of surface damage, and improvement of fastening stability.
They are suitable for applications where high precision in flatness is required, such as furniture assembly, automotive parts, and electronic device housings.
We have a wide range of countersunk washer stock: with outer diameters ranging from 8 millimeters to 50 millimeters, the inner countersunk hole dimensions match the standard screw heads, and there are various material grades to suit different environments.
For projects with unique demands, our custom countersunk hole washer service is the perfect solution. We work closely with you to create washers that align with your exact needs—whether it’s non-standard dimensions, specialized materials or custom surface treatments.
The customization process is streamlined: share your drawings or specifications, receive a detailed quote within 24 hours, and get your custom order delivered in as little as 5-7 business days.
Quality is at the core of our countersunk washers. Every unit, whether in-stock or custom, undergoes strict quality control checks—including dimensional accuracy testing, material hardness verification, and corrosion resistance assessments.
Washer has a wide range of applications and is used in numerous fields.
In the automotive industry, they are used to fix interior panels to create a beautiful appearance.
In the construction field, they are used to fix decorative accessories without exposing the head.
In the electronics field, they can protect sensitive components from damage caused by fasteners.
In furniture manufacturing, they ensure a smooth and safe surface.
In ship applications, corrosion-resistant gaskets can function in harsh saltwater environments.
Q: How quickly can I receive in-stock countersunk washers?
A: In-stock items ship the same day if ordered before 3 PM, with delivery typically taking 1-3 business days depending on your location.
Q: What information do I need to provide for custom washers?
A: Please share detailed drawings (with outer diameter, hole size, thickness, and countersink angle) and material/surface treatment requirements.
Q: Can I get countersunk washers in non-metallic materials?
A: Yes, we offer custom washers in plastic (nylon, PTFE) and rubber for insulation or vibration-damping needs.
Q: Do your washers meet industry standards?
A: All our washers comply with ISO 9001 quality standards and can be manufactured to DIN, ANSI, or BS specifications upon request.
Q: Is there a minimum order quantity for custom washers?
A: No, we accept small-batch custom orders starting from 100 units, making us ideal for both prototype and large-scale production.