A
Anonymous
Mar 16, 2026
Rating: 4/5
Nice finish
The black coating is smooth. Driving them in was easy without stripping the head.
Description
These are cross-recessed self-tapping screws featuring a rounded mushroom head design, intended for fastening applications in metal, plastic, or wood assemblies. Constructed from 304 stainless steel, the fasteners offer corrosion resistance and durability, finished with a black zinc plating that provides additional protection against oxidation while delivering a matte black appearance. The Phillips drive recess allows for efficient torque transfer during installation using standard hand or power drivers. Available in metric diameters including M3, M4, M5, and M6mm, these screws conform to GB standards for dimensional consistency. Select the specific diameter required for your project to ensure proper fit and holding strength. When installing, apply steady pressure to prevent cam-out and ensure the head sits flush with the material surface.
Reviews
Attributes
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material | 304 Stainless Steel |
| Surface Treatment | Black Zinc Plated |
| Head Style | Large Flat Head (Mushroom) |
| Drive Type | Phillips Cross |
| Thread Type | Self-Tapping |
| Standard | GB (Guobiao) |
| Available Sizes | M3, M4, M5, M6 |
| Color | Black |
| Hardness | HRC 40-45 |
| Package Weight | Approx. 500g |
5 reviews
A
Anonymous
Mar 12, 2026
Rating: 5/5
Strong and durable
Used these for outdoor furniture. No rust so far after 3 months of exposure.
A
Anonymous
Mar 06, 2026
Rating: 4/5
Good value
Solid screws for the price. One box had a few dented heads but mostly fine.
A
Anonymous
Mar 04, 2026
Rating: 5/5
Perfect for electronics casing
The M3 size is exactly what I needed for my PC build. Very precise threads.
A
Anonymous
Jan 22, 2026
Rating: 5/5
Excellent quality screws
These fit perfectly in my project. The black finish looks sleek and professional.
5 FAQ
Q: Are these magnetic?
A: 304 stainless steel is generally non-magnetic or slightly magnetic depending on processing.
Q: What Phillips bit size do I need?
A: Typically PH2 for M4 and above, PH1 for M3 sizes.
Q: Is the black coating prone to scratching?
A: The zinc plating is durable, but care should be taken during installation to avoid scratches.
Q: Do you sell these in M8 size?
A: Currently, we only stock M3 through M6 for this specific model.
Q: Are these suitable for hardwood?
A: Yes, they are self-tapping and work well on hardwood surfaces.
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