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Home / Screws / 304 Stainless Steel Flat Head Cross Recessed Countersunk Self-Tapping Screws, Extended Length, National Standard Fasteners M3 M4 M5 M6 M8

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Head Style Flat Head Countersunk
Drive Type Cross Recessed (Phillips)
Thread Type Self-Tapping
Available Sizes M3, M4, M5, M6, M8
Standard National Standard Fasteners
Finish Polished Silver
Length Type Extended Length Options
Corrosion Resistance High (Suitable for Outdoor Use)
Application Metal, Wood, and Plastic Assembly

6 reviews

A

Anonymous

Mar 24, 2026

Rating: 5/5

Perfect for outdoor projects

These stainless steel screws are exactly what I needed for my deck repair. The countersunk head sits flush, and the material feels very durable against the elements.

A

Anonymous

Mar 16, 2026

Rating: 4/5

Good quality, slightly hard to drive

The build quality is excellent and they look great. However, driving them into hardwood required a bit more torque than expected. Still, no stripping occurred.

A

Anonymous

Mar 16, 2026

Rating: 5/5

Rust-free after months of use

Installed these on a garden gate six months ago. Despite rain and humidity, there is absolutely no sign of rust. Highly recommend for exterior applications.

A

Anonymous

Mar 14, 2026

Rating: 5/5

Professional grade fasteners

As a contractor, I go through a lot of screws. These 304 stainless ones are consistent in thread quality and head shape. Will definitely buy again.

A

Anonymous

Mar 13, 2026

Rating: 5/5

Great variety of sizes

I ordered a mix of M4 and M6 sizes. Having extended length options available made it easy to find the right fit for my thicker metal brackets.

A

Anonymous

Mar 08, 2026

Rating: 3/5

Decent but packaging could be better

The screws themselves are fine and meet the description. However, the small sizes were all mixed together in the bag, making sorting a bit tedious.

5 FAQ

Q: Are these screws suitable for marine environments?

A: While 304 stainless steel offers good corrosion resistance, for constant submersion or highly saline marine environments, we typically recommend 316 stainless steel for superior protection.

Q: Do these come with matching nuts?

A: No, this product listing is for self-tapping screws only, which create their own threads in the material. Nuts are not required for installation nor included in the package.

Q: Can I use these on aluminum sheets without galvanic corrosion?

A: Stainless steel can cause galvanic corrosion when in direct contact with aluminum in wet conditions. We suggest using a barrier sealant or choosing aluminum fasteners for that specific application.

Q: What driver size do I need for the M6 screws?

A: For the M6 cross recessed screws, a standard PH2 (Phillips #2) driver bit is usually the best fit to prevent cam-out and ensure proper torque.

Q: Is the thread full length or partial?

A: These self-tapping screws feature a full thread length design, maximizing grip and holding power throughout the entire shaft of the screw.

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