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Home / Screws / Carbon Steel Black Round Head Cross Screw Nut Set Assortment Extended Pan Head Screw Flat Spring Washer M3 M4 M5 M6

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material Carbon Steel
Head Style Round Head / Pan Head
Drive Type Cross (Phillips)
Finish Black Oxide
Included Sizes M3, M4, M5, M6
Components Screws, Nuts, Flat Washers, Spring Washers
Thread Type Metric Coarse
Application General Machinery, Electronics, DIY Projects
Corrosion Resistance Moderate (Indoor Use Recommended)
Package Type Assortment Kit with Storage Box

6 reviews

A

Anonymous

Mar 21, 2026

Rating: 4/5

Good value but box could be better

The quality of the hardware is excellent for the price. My only complaint is that the plastic divider in the box cracked slightly during shipping, but the parts were safe.

A

Anonymous

Mar 07, 2026

Rating: 4/5

Solid basic hardware

These are standard carbon steel screws, not stainless, so keep them dry. For indoor mechanical assemblies, they work flawlessly.

A

Anonymous

Mar 07, 2026

Rating: 5/5

Perfect assortment for my workshop

This kit has everything I needed for various small repairs. The black finish looks professional and the screws fit tightly without stripping.

A

Anonymous

Mar 03, 2026

Rating: 5/5

Highly recommended for DIYers

I bought this for furniture assembly and general home fixes. The variety of sizes covers almost every scenario I've encountered so far.

A

Anonymous

Mar 02, 2026

Rating: 5/5

Exactly as described

Fast shipping and the set matches the description perfectly. Having the nuts and washers included saves a lot of time running to the hardware store.

A

Anonymous

Mar 01, 2026

Rating: 5/5

Great for electronics projects

I use these M3 and M4 screws frequently for mounting components in my 3D printer builds. The cross head drives cleanly with standard bits.

5 FAQ

Q: Does the kit include a storage case?

A: Yes, the assortment comes in a compartmentalized plastic storage box to keep the different sizes organized.

Q: Are these screws made of stainless steel?

A: No, these are made of carbon steel with a black oxide finish. They are suitable for indoor use but may rust if exposed to moisture outdoors.

Q: Can I use these for outdoor garden furniture?

A: We do not recommend using carbon steel screws for outdoor applications as they are not corrosion-resistant enough for prolonged exposure to weather. Stainless steel would be a better choice.

Q: How many pieces are approximately in the set?

A: The set contains approximately 300 pieces, including a mix of screws, nuts, flat washers, and spring washers across the M3 to M6 sizes.

Q: What is the thread pitch for the M5 screws?

A: The M5 screws feature a standard metric coarse thread pitch of 0.8mm.

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