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

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Finish Black Oxide Coated
Head Style Flat Head (Countersunk)
Drive Type Cross Recessed (Phillips)
Thread Type Self-Tapping
Available Sizes M3, M4, M5, M6, M8
Standard Extended National Standard
Corrosion Resistance High (Suitable for Indoor/Outdoor)
Application Metal, Plastic, and Wood Assembly
Package Content Assorted Kit (100 Pieces)

6 reviews

A

Anonymous

Mar 26, 2026

Rating: 5/5

Excellent corrosion resistance

I used these for an outdoor garden fixture. After three months of rain and sun, there is zero sign of rust. The black coating has held up remarkably well compared to other brands I've tried.

A

Anonymous

Mar 25, 2026

Rating: 4/5

Solid standard fasteners

Very reliable screws for general machinery maintenance. The flat head sits flush as expected. Only giving 4 stars because the packaging could be better organized by size.

A

Anonymous

Mar 15, 2026

Rating: 4/5

Good quality, slightly hard to find M8

Overall great fasteners. The M3 and M4 sizes were perfect for my electronics enclosure. The M8 size was a bit scarce in the kit I received, but the quality of the metal is top-notch.

A

Anonymous

Mar 14, 2026

Rating: 5/5

Sharp threads make installation easy

The self-tapping feature works beautifully on aluminum sheets. I didn't need to pre-drill pilot holes for the smaller sizes, which saved me a lot of time during assembly.

A

Anonymous

Mar 11, 2026

Rating: 5/5

Perfect for my DIY projects

These screws are exactly what I needed. The black finish looks sleek on my custom PC build, and the 304 stainless steel ensures they won't rust over time. The Phillips head grips well without stripping.

A

Anonymous

Mar 07, 2026

Rating: 5/5

Great value for money

You get a lot of high-quality screws for the price. The black aesthetic is consistent across all pieces, and they feel very sturdy. Will definitely buy again for future workshops.

5 FAQ

Q: Can these be used on hardwood?

A: Yes, these self-tapping screws can penetrate hardwood, but we strongly recommend drilling a pilot hole first to prevent the wood from splitting and to ensure a clean finish.

Q: Is the black coating prone to chipping?

A: The black oxide finish is durable for standard applications. However, like any coating, it can chip if subjected to extreme abrasion or impact during installation. Using the correct driver size minimizes this risk.

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

A: While 304 stainless steel offers good corrosion resistance, we recommend 316 stainless steel for direct, constant exposure to saltwater. These are excellent for general outdoor use but may not be ideal for harsh marine conditions.

Q: What driver size do I need for the M5 screws?

A: For the M5 Cross Recessed screws, a standard PH2 (Phillips #2) screwdriver bit is typically the correct size to ensure proper torque without stripping the head.

Q: Do you sell these in bulk quantities over 1000 pieces?

A: Yes, we offer bulk pricing for orders exceeding 1000 pieces. Please contact our sales department directly through the 'Contact Seller' button for a custom quote.

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