Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Washers
Origin	-
Material	65Mn Spring Steel
Surface Finish	Zinc Plated (Blue/White)
Hardness	42-50 HRC
Available Sizes	M8, M10, M12, M16, M20, M30, M36, M56, M64
Standard Compliance	DIN 127 / ISO 7090
Package Type	Bulk Box or Plastic Bag
Application	Heavy Machinery, Automotive, Construction
Corrosion Resistance	Moderate (Suitable for indoor use)
Thread Compatibility	Metric Coarse Thread
Country of Origin	China

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Exactly as described

Needed specific large sizes like M56 for a custom fabrication job. These were hard to find locally, but this seller had them in stock. Hardness is consistent across the batch.

Anonymous

Mar 22, 2026

Rating: 5/5

Great for automotive repair

Used these on my truck's suspension system. The split design provides excellent locking action. No loosening after 500 miles of off-road driving.

Anonymous

Mar 20, 2026

Rating: 5/5

Perfect for heavy-duty applications

Ordered the M20 and M30 sizes for a construction project. The steel quality is excellent, and they hold tension very well under vibration. Highly recommended for industrial use.

Anonymous

Mar 13, 2026

Rating: 3/5

Decent but zinc coating is thin

Functionality is fine, but I noticed the zinc plating is quite thin on the M8 size. If you are using these outdoors, you might want to apply extra protection.

Anonymous

Mar 12, 2026

Rating: 4/5

Good value but packaging could be better

The washers themselves are high quality and fit perfectly on our M12 bolts. However, the bulk box arrived slightly dented, though no parts were lost. Would buy again.

Anonymous

Mar 07, 2026

Rating: 5/5

Fast shipping and great quality

Impressed with how quickly the M16 and M36 mixed order arrived. The washers are uniform and show no signs of cracking when compressed. Will order more soon.

5 FAQ

Q: Is a certificate of material analysis available?

A: Yes, for bulk orders over 50kg, we can provide a Mill Test Certificate (MTC) upon request at the time of purchase. Please contact us directly after placing your order.

Q: Are these washers suitable for outdoor marine environments?

A: These washers have a standard zinc plating which offers moderate corrosion resistance. For marine environments, we recommend applying an additional anti-corrosive coating or selecting our stainless steel variant.

Q: Do you sell these in individual counts or only by weight?

A: We primarily sell by weight for bulk orders, but you can select specific quantities for smaller sizes like M8 and M10 via the custom quantity selector on the product page.

Q: What is the exact hardness rating for the M64 size?

A: All sizes, including M64, undergo heat treatment to achieve a hardness range of 42-50 HRC, ensuring consistent spring performance across the entire product line.

Q: Can these be reused after removal?

A: While spring lock washers are designed for single-use to guarantee optimal locking force, they can be reused in non-critical, low-vibration applications if they have not been permanently deformed.

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