Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Screws
Origin	-
Material	Carbon Steel
Surface Finish	Black Zinc Plated
Head Style	Countersunk Flat Head
Drive Type	Phillips (Cross)
Thread Type	Self-Tapping
Standard	GB846
Available Sizes	M2, M2.5, M3, M4, M5, M6
Application	Metal, Plastic, and Wood Assembly
Corrosion Resistance	Moderate (Indoor Use Recommended)
Package Type	Bulk Box or Retail Pack

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Perfect for metal projects

These screws tap cleanly into sheet metal without stripping. The black finish looks professional and matches my project aesthetics perfectly.

Anonymous

Mar 26, 2026

Rating: 4/5

Good value for money

Bought a box of M4 sizes for assembling computer cases. They work well, though the heads can strip if you use too much torque with a manual driver.

Anonymous

Mar 16, 2026

Rating: 5/5

Consistent quality

I've ordered these three times now. Every batch has been consistent in size and thread quality. Highly recommended for DIY electronics enclosures.

Anonymous

Mar 06, 2026

Rating: 4/5

Solid hardware

Great screws for general purpose use. The zinc coating seems durable enough for indoor applications. Just wish they came in larger quantities.

Anonymous

Mar 06, 2026

Rating: 5/5

Sharp and effective

The self-tapping point is very sharp. I didn't need to pre-drill holes in thin aluminum sheets, which saved me a lot of time.

Anonymous

Mar 02, 2026

Rating: 5/5

Exactly as described

Fit the GB846 standard perfectly. Used them for repairing a small appliance and they held tight. No complaints at all.

5 FAQ

Q: Do I need to pre-drill holes for M6 size in hardwood?

A: For hardwoods, it is generally advisable to pre-drill a pilot hole even with self-tapping screws to prevent splitting the wood and to ensure easier driving.

Q: What screwdriver bit size fits the M4 Phillips head?

A: Typically, a PH2 bit is suitable for M4 and larger sizes in this series, while M2 and M2.5 may require a PH1 bit.

Q: Is the black coating prone to chipping?

A: The black zinc finish is durable under normal installation conditions. However, excessive force or using the wrong driver type can cause minor chipping on the head.

Q: Are these screws suitable for outdoor use?

A: While the black zinc plating offers some corrosion resistance, these screws are primarily designed for indoor applications. For outdoor use, we recommend stainless steel variants.

Q: Can these be used to attach plastic components to metal frames?

A: Yes, these self-tapping screws are excellent for fastening plastic to metal, provided the plastic is thick enough to hold the threads securely.

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