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Home / Screws / Color Zinc Hardened Cross Flat Head Self-Tapping Screw Countersunk Fiberboard Nail Drywall Self-Tapping Screw M3 M3.5 M4 M5

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material Carbon Steel
Surface Finish Color Zinc Plated
Head Type Countersunk Flat Head
Drive Type Cross (Phillips)
Thread Type Self-Tapping
Available Sizes M3, M3.5, M4, M5
Application Fiberboard, Drywall, Wood
Hardness Hardened
Corrosion Resistance Moderate (Indoor Use)
Package Content Assorted Box with Invoice

6 reviews

A

Anonymous

Mar 26, 2026

Rating: 5/5

Sharp and strong

Very sharp points make self-tapping easy. I used them on hard fiberboard and they went in smoothly with minimal effort.

A

Anonymous

Mar 24, 2026

Rating: 5/5

Perfect for drywall projects

These screws drove straight into the fiberboard without splitting. The zinc coating looks durable and the cross head grips well.

A

Anonymous

Mar 20, 2026

Rating: 4/5

Good value for money

Bought the M4 size for a shelving unit. They hold tight and the countersunk head sits flush. One box had a few bent tips but mostly good.

A

Anonymous

Mar 10, 2026

Rating: 5/5

Great assortment

Having multiple sizes in one order was convenient. The color zinc finish matches my other hardware perfectly.

A

Anonymous

Mar 05, 2026

Rating: 4/5

Solid construction screws

Used these for a workshop bench. They are hardened as described and didn't strip under high torque. Would buy again.

A

Anonymous

Mar 03, 2026

Rating: 5/5

Reliable fasteners

No issues with breaking or bending. The invoice provided was clear which helped with my expense reporting.

5 FAQ

Q: Can these be used on metal studs?

A: These are primarily designed for wood, fiberboard, and drywall. While they might penetrate thin metal, we suggest using specific self-drilling metal screws for metal stud applications.

Q: Are these screws suitable for outdoor use?

A: While they have a color zinc coating for some corrosion resistance, they are best suited for indoor applications like drywall and fiberboard. For outdoor use, we recommend stainless steel options.

Q: Do these come in bulk packs or just small boxes?

A: We offer both small assorted boxes for DIY projects and larger bulk packs for professional contractors. Please check the size selector on the product page.

Q: Is the invoice digital or physical?

A: A digital invoice is automatically generated and sent to your email upon purchase. If you require a physical copy, please contact our customer service after ordering.

Q: What driver bit size do I need for the M4 screws?

A: For the M4 cross head screws, a standard PH2 (Phillips #2) driver bit is typically the correct size to ensure a good grip without stripping.

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