A
Anonymous
Apr 14, 2026
Rating: 5/5
Great Quality
Very strong washers. No deformation under torque.
Description
Grade 12.9 High-Strength GB93 Black Spring Washers and Locking Fasteners, M3-M8
Reviews
Attributes
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material | Alloy Steel |
| Strength Grade | 12.9 |
| Surface Finish | Black Oxide |
| Standard | GB93 |
| Sizes Included | M3, M4, M5, M6, M8 |
| Hardness | 39-44 HRC |
| Tensile Strength | 1220 MPa |
| Package Count | 100 Pieces |
| Thread Type | Metric Coarse |
| Net Weight | 500 Grams |
5 reviews
A
Anonymous
Apr 07, 2026
Rating: 5/5
Quick Ship
Arrived fast. Product matches description.
A
Anonymous
Apr 04, 2026
Rating: 5/5
Perfect Fit
Matched my M5 screws exactly. Happy with purchase.
A
Anonymous
Mar 21, 2026
Rating: 4/5
Good Value
Solid washers. Packaging could be sturdier.
A
Anonymous
Jan 25, 2026
Rating: 5/5
Reliable
Using for bike assembly. Holds well against vibration.
5 FAQ
Q: Are these reusable?
A: Spring washers are generally single-use for critical apps.
Q: Can I get M10 size?
A: Currently we stock up to M8 for this kit.
Q: Are these hardened?
A: Yes, they are hardened to 12.9 grade specifications.
Q: Is coating durable?
A: Black oxide is durable for general mechanical use.
Q: Do you ship internationally?
A: Yes, we ship to most countries.
![[M2-M20] Stainless Steel Spring Washer](https://www.gosteppe.com/cache/medium/product/16306/legacy-main-ef3d2dba3bde669d48e6cca2.webp)
