Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Washers
Origin	-
Material	304 Stainless Steel
Surface Finish	Black Oxide Coated
Standard	GB858
Design Type	Six-Claw Crab Locking Plate
Application	Round Nut Stop Motion
Hardness	High Tensile Strength
Corrosion Resistance	Excellent (Industrial Grade)
Package Quantity	50 Pieces per Pack
Compatibility	Metric Round Nuts
Origin	Manufactured in China

6 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Solid construction

Very sturdy locking plates. The claws are sharp enough to bite into the nut slot but not so aggressive that they damage the surrounding area. Good product overall.

Anonymous

Mar 30, 2026

Rating: 5/5

Exactly as described

Matches the GB858 standard perfectly. Installation was straightforward, and they provide the security needed for our rotating assembly lines. Will order again.

Anonymous

Mar 26, 2026

Rating: 5/5

Essential for vibration heavy equipment

I use these on industrial fans where vibration is a constant issue. They hold the round nuts tight and prevent any loosening over time. Highly recommended for mechanical applications.

Anonymous

Mar 25, 2026

Rating: 5/5

Great value for bulk purchase

Bought these for our workshop inventory. The price point is excellent for genuine 304 steel. The black coating seems resistant to oil and grease which is a plus.

Anonymous

Mar 16, 2026

Rating: 4/5

Good quality steel

The 304 stainless steel feels very durable. I deducted one star only because the packaging was a bit loose, but the washers themselves arrived undamaged and function perfectly.

Anonymous

Mar 13, 2026

Rating: 5/5

Perfect fit for machinery repair

These locking plates are exactly what I needed for my lathe maintenance. The black finish looks professional and the six-claw design grips the round nut securely without slipping.

5 FAQ

Q: Does the black oxide coating wear off easily under friction?

A: The black oxide finish is durable for standard industrial use. While some wear may occur at the contact points of the claws over extended periods, it does not affect the locking functionality.

Q: What is the thickness of these washers?

A: The thickness varies depending on the specific diameter size selected. Please refer to the detailed specification chart in the product images for exact measurements per size.

Q: Are these compatible with imperial round nuts or only metric?

A: These locking plates are manufactured to the GB858 standard, which is primarily designed for metric round nuts. They may not fit imperial sizes correctly.

Q: Is this material safe for outdoor exposure to rain?

A: Yes, 304 Stainless Steel offers excellent corrosion resistance and is suitable for outdoor environments, though regular inspection is advised in highly saline or acidic conditions.

Q: Can these be reused after removal?

A: Yes, 304 stainless steel allows for multiple uses. However, we recommend inspecting the claws for deformation before reusing them in critical high-vibration applications.

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