Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Screws
Origin	-
Material	High-strength carbon steel with zinc plating
Head Type	External Hexagon
Drive Size	8mm Hex Socket
Thread Size	M4.8
Washer Type	Composite EPDM Rubber and Metal
Point Type	Drill Tail (Self-drilling)
Standard Compliance	National Standard GB/T
Application	Color Steel Roofing Tiles and Cladding
Corrosion Resistance	Salt Spray Tested for Outdoor Use
Package Quantity	100 Pieces per Box

6 reviews

Anonymous

Mar 27, 2026

Rating: 5/5

Perfect for metal roofing projects

These screws drilled right through the color steel sheets without needing pre-drilled holes. The composite washer created a tight seal, and I haven't seen any leaks after two heavy rainstorms.

Anonymous

Mar 11, 2026

Rating: 4/5

Good quality, sharp tips

Very sharp drill points that make installation fast. I deducted one star only because the box was slightly dented on arrival, but the screws inside were fine.

Anonymous

Mar 10, 2026

Rating: 5/5

Professional grade fasteners

I use these daily on commercial roofing jobs. They hold up well against the elements and the hex head doesn't strip easily even with high torque settings.

Anonymous

Mar 06, 2026

Rating: 5/5

Saved me so much time

Installing my garden shed roof was a breeze. The self-tapping feature works exactly as described on 0.5mm steel sheets. Highly recommended for DIYers.

Anonymous

Mar 02, 2026

Rating: 4/5

Solid performance

The rubber washers seem durable and flexible. Installation was smooth. Just make sure you have a good magnetic bit holder as the hex heads are standard size.

Anonymous

Mar 01, 2026

Rating: 5/5

Excellent value for money

Bought these for a large warehouse repair. The national standard quality is evident; they are uniform in size and finish. No rust spots visible yet.

5 FAQ

Q: What thickness of metal sheet can these screws penetrate without pre-drilling?

A: These M4.8 drill tail screws are designed to self-drill through color steel sheets ranging from 0.5mm to 3.0mm in thickness without the need for pre-drilling.

Q: Do these come in different lengths?

A: This specific listing is for the standard length suitable for most general roofing applications. Please check our other listings or contact us directly for custom lengths.

Q: Is the washer resistant to UV degradation over time?

A: Yes, the composite washer is made from high-quality EPDM rubber which offers excellent resistance to UV radiation, ozone, and weathering, ensuring a long-lasting seal.

Q: What type of driver bit do I need for these?

A: You will need a standard 8mm hex socket bit. We recommend using a magnetic tip to prevent dropping screws when working at heights.

Q: Are these suitable for use in coastal areas with salt air?

A: While they have a zinc plating for corrosion resistance, for harsh coastal environments with direct salt spray exposure, we recommend our stainless steel variant for maximum longevity.

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