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Home / Screws / 304 Stainless Steel Self-Tapping Screw GB846 Cross Countersunk Extended Wood Screw Flat Head Slotted C2 M3 M4 Size 5mm 6mm

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Head Style Flat Head Countersunk
Drive Type Cross (Phillips) / Slotted
Thread Type Self-Tapping
Standard GB846
Available Sizes M3, M4
Length Options 5mm, 6mm
Finish Polished Silver
Corrosion Resistance High (Suitable for Outdoor Use)
Application Wood, Plastic, Thin Metal Sheets

6 reviews

A

Anonymous

Mar 26, 2026

Rating: 5/5

Fast shipping and great product

Arrived quickly and well-organized. The quality of the steel is evident as soon as you hold them. They feel heavy and durable compared to cheaper alternatives.

A

Anonymous

Mar 23, 2026

Rating: 5/5

Perfect for marine applications

Used these on a small boat repair. After a few weeks of exposure to salt water, there is absolutely no sign of corrosion. Highly recommended for marine environments.

A

Anonymous

Mar 18, 2026

Rating: 5/5

Excellent quality stainless steel

These screws are exactly what I needed for my outdoor deck project. The 304 stainless steel ensures they won't rust, and the dual drive head makes installation very flexible.

A

Anonymous

Mar 17, 2026

Rating: 5/5

Precise sizing

Ordered the M4 6mm size and they fit perfectly into my pre-drilled holes. The countersunk head sits flush with the surface, giving a very professional finish.

A

Anonymous

Mar 10, 2026

Rating: 4/5

Solid hardware

Very sturdy screws. The cross slot is deep enough to prevent cam-out. Would buy again for future woodworking projects.

A

Anonymous

Mar 02, 2026

Rating: 4/5

Good value, sharp threads

The self-tapping feature works great on soft wood. I deducted one star only because the packaging was a bit flimsy, but the screws themselves are top-notch.

5 FAQ

Q: Is this product sold individually or in packs?

A: This listing is for a pack of screws. Please select your desired quantity and size combination from the dropdown menu before adding to cart.

Q: Are these screws suitable for use in saltwater environments?

A: Yes, being made of 304 Stainless Steel, these screws offer high corrosion resistance and are suitable for marine and outdoor saltwater applications.

Q: Do I need to pre-drill holes for wood?

A: While these are self-tapping, we recommend pre-drilling a pilot hole slightly smaller than the screw diameter for hardwoods to prevent splitting and ensure a clean finish.

Q: Can I use a standard Phillips screwdriver for these?

A: Absolutely. These screws feature a cross (Phillips) drive compatible with standard Phillips screwdrivers, though they also have a slot for flathead drivers if needed.

Q: What is the difference between M3 and M4 sizes?

A: M3 refers to a nominal diameter of 3mm, while M4 refers to 4mm. Please check your project specifications to select the correct diameter and length.

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