Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Washers
Origin	-
Material	Carbon Steel
Surface Finish	Blue/White Zinc Plated
Standard	National Standard (GB)
Type	Extra Large Flat Washer
Available Sizes	M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M24, M27, M30, M33, M36
Hardness	HV 140-200
Application	Construction, Machinery, Automotive Assembly
Corrosion Resistance	Moderate (Suitable for Indoor Use)
Package Type	Bulk Box or Custom Packaging
Origin	Manufactured in China

6 reviews

Anonymous

Mar 30, 2026

Rating: 5/5

Exactly as described

Needed specific extra large sizes for a custom repair job. The M24 and M30 sizes were hard to find locally, but these worked perfectly. No complaints.

Anonymous

Mar 22, 2026

Rating: 4/5

Solid construction

Very sturdy washers. The white zinc finish is clean. They handled high torque applications without deforming. Just wish they offered a black oxide option too.

Anonymous

Mar 15, 2026

Rating: 5/5

Excellent value for bulk purchase

Bought a mixed lot of M8 through M12 for our workshop. These are solid, flat, and free of burrs. Great price point compared to local hardware stores.

Anonymous

Mar 09, 2026

Rating: 4/5

Good quality, fast shipping

The washers arrived well-packaged and matched the specifications perfectly. I deducted one star only because the blue tint varied slightly between batches, but functionality is not affected.

Anonymous

Mar 08, 2026

Rating: 5/5

Reliable standard parts

We use these regularly for assembling machinery frames. The national standard sizing ensures they fit our bolts without any issues. Will order again.

Anonymous

Mar 02, 2026

Rating: 5/5

Perfect fit for heavy-duty projects

Ordered the M16 size for a structural steel project. The zinc plating looks uniform and the extra large diameter provides excellent load distribution. Highly recommended for industrial use.

5 FAQ

Q: Can I mix different sizes in one order?

A: Yes, you can select individual quantities for each size (M4 to M36) during checkout to create a custom mixed pack according to your project needs.

Q: Is the blue/white plating safe for sensitive electronic enclosures?

A: The zinc plating is generally safe, but if your application involves highly sensitive electronics where conductive dust is a concern, we suggest using nylon washers or ensuring proper cleaning before installation.

Q: Do you provide certification documents for these parts?

A: Yes, material certificates and inspection reports are available upon request for bulk orders. Please contact our sales team with your order number to obtain them.

Q: What is the thickness of the M12 extra large washer?

A: For the M12 Extra Large Flat Washer, the typical thickness is 3mm, with an outer diameter of approximately 44mm, adhering to the relevant National Standard dimensions.

Q: Are these washers suitable for outdoor exposure?

A: While the zinc plating offers some corrosion resistance, these are primarily designed for indoor or controlled environments. For prolonged outdoor exposure, we recommend stainless steel or hot-dip galvanized options.

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