Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Washers
Origin	-
Material	65Mn Spring Steel
Strength Grade	8.8
Standard	GB/T 93-1987
Surface Treatment	Black Oxide Coating
Available Sizes	M6, M8, M10, M12, M14, M16
Hardness	HRC 44-50
Type	Split Spring Lock Washer
Application	Automotive, Machinery, Construction
Package Quantity	100 Pieces per Box
Corrosion Resistance	Moderate (Indoor/Protected Use)

6 reviews

Anonymous

Mar 15, 2026

Rating: 5/5

Exactly as described

Grade 8.8 strength is noticeable. These don't flatten out easily. Will be ordering more for my workshop inventory.

Anonymous

Mar 15, 2026

Rating: 5/5

Great value for money

Bought a mixed pack. The split design works well to prevent loosening under vibration. Much better than the cheap zinc ones I used before.

Anonymous

Mar 13, 2026

Rating: 5/5

Perfect for automotive repairs

These washers are exactly what I needed for my suspension work. The black oxide finish looks great and the steel feels very strong. No deformation when tightened.

Anonymous

Mar 11, 2026

Rating: 4/5

Solid hardware

Very sturdy washers. The black coating seems durable. Just make sure you select the right size as they are quite thick compared to standard flat washers.

Anonymous

Mar 09, 2026

Rating: 4/5

Good quality, fast shipping

Ordered the M8 size for a DIY project. They fit perfectly and provide good tension. One star off because the box was slightly dented, but the contents were fine.

Anonymous

Mar 02, 2026

Rating: 5/5

Industrial grade quality

We use these in our manufacturing line. Consistent hardness and dimensions across the batch. Highly recommend for any heavy-duty application.

5 FAQ

Q: Do you sell these in bulk quantities over 1000 pieces?

A: Yes, we offer bulk pricing for orders exceeding 1000 pieces. Please contact our sales team directly through the 'Contact Seller' button for a custom quote.

Q: What is the inner diameter of the M10 washer?

A: According to the GB93 standard, the inner diameter for an M10 spring lock washer is approximately 10.2mm to ensure a proper fit over the bolt shaft.

Q: Is the material certified?

A: Our 65Mn spring steel material meets the GB/T 93 standards. Mill test reports are available upon request for large industrial orders.

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

A: While the black oxide coating offers some protection, these are best suited for indoor or protected environments. For prolonged outdoor exposure, we recommend stainless steel or hot-dip galvanized options.

Q: Can I use these with high-tensile bolts?

A: Yes, these Grade 8.8 washers are specifically designed to be paired with high-tensile bolts to maintain preload and prevent loosening under vibration.

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