Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Washers
Origin	-
Material	65Mn Spring Steel
Surface Finish	Black Oxide Coating
Standard	GB/T 93-1987
Hardness	42-50 HRC
Available Sizes	M3, M4, M5, M6, M8, M10, M12, M16, M20, M24, M30, M36, M42, M48, M56, M64
Type	Split Lock Washer
Application	High-Pressure Mechanical Assembly
Corrosion Resistance	Moderate (Indoor/Dry Environments)
Package Type	Bulk Bag or Box
Origin	Manufactured in China

6 reviews

Anonymous

Mar 23, 2026

Rating: 5/5

Great value for bulk purchase

Bought the M10 size in bulk for our workshop. The price per unit is unbeatable compared to local hardware stores. Quality is solid for general mechanical use.

Anonymous

Mar 16, 2026

Rating: 4/5

Good quality, fast shipping

Needed a variety pack for a custom project. The M3 to M8 range was exactly what I needed. One bag had a few slightly bent washers, but 95% were perfect.

Anonymous

Mar 15, 2026

Rating: 5/5

Reliable supplier

Third time ordering from this listing. Consistency in size and finish is key for our assembly line, and these deliver every time. Highly recommended for B2B needs.

Anonymous

Mar 14, 2026

Rating: 5/5

Excellent hardness

As an engineer, I appreciate that these meet the GB93 standard strictly. The hardness is consistent, which is crucial for high-pressure applications. Will buy again.

Anonymous

Mar 12, 2026

Rating: 4/5

Solid washers

These work great for preventing loosening on bolted joints. The split design provides good spring action. Just make sure to select the right size for your bolts.

Anonymous

Mar 07, 2026

Rating: 5/5

Perfect for heavy machinery maintenance

Ordered the M16 and M20 sizes for our industrial equipment. The black oxide finish looks professional and the steel feels very robust. They hold tension well under vibration.

5 FAQ

Q: What is the maximum temperature these washers can withstand?

A: Made from 65Mn spring steel, these washers can generally operate effectively in temperatures up to 200°C (392°F) without losing their spring properties.

Q: Are these washers suitable for outdoor use in rainy conditions?

A: These washers have a black oxide coating which offers moderate corrosion resistance. For prolonged outdoor or wet exposure, we recommend applying additional grease or using stainless steel variants.

Q: Is there a certificate of conformity available for these parts?

A: Yes, for bulk orders over 50kg, we can provide a material test report and certificate of conformity upon request. Please contact us after placing your order.

Q: Do you sell individual sizes or only mixed kits?

A: We offer both options. You can select specific sizes like M3, M4, etc., individually in bulk quantities, or choose our assorted kit which contains a range of common sizes.

Q: Can these be used with metric bolts only?

A: These are manufactured to GB93 standards which align with ISO metric threads. They are designed specifically for metric bolts ranging from M3 to M64.

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