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Home / Screws / Carbon Steel Black Countersunk Phillips Screws and Nuts Combination Kit, Flat Head Screws, Nuts, Flat Washers, and Spring Washers M3 M4

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material Carbon Steel
Finish Black Oxide
Head Style Flat Head (Countersunk)
Drive Type Phillips
Included Sizes M3, M4
Kit Contents Screws, Nuts, Flat Washers, Spring Washers
Thread Type Metric Coarse
Application General Assembly, Machinery, Electronics
Corrosion Resistance Moderate (Indoor Use Recommended)
Package Type Compartmentalized Storage Box

6 reviews

A

Anonymous

Mar 30, 2026

Rating: 4/5

Good value, organized box

The compartmentalized box makes it easy to find the right size quickly. One of the M4 nuts was slightly tight, but overall a great purchase.

A

Anonymous

Mar 24, 2026

Rating: 4/5

Solid basic kit

Does exactly what it says. The black coating seems durable so far. Would be nice to have M5 sizes included, but for M3 and M4, this is excellent.

A

Anonymous

Mar 17, 2026

Rating: 5/5

High quality carbon steel

Very sturdy screws. I used them to assemble a metal shelf and they held up perfectly under pressure. Highly recommend for DIY enthusiasts.

A

Anonymous

Mar 12, 2026

Rating: 5/5

Perfect for my workshop needs

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

A

Anonymous

Mar 10, 2026

Rating: 5/5

Great assortment

Having both flat and spring washers included saved me a trip to the hardware store. The Phillips heads are well-formed and easy to drive.

A

Anonymous

Mar 06, 2026

Rating: 5/5

Best seller for a reason

Fast shipping and the product quality exceeded my expectations. The countersunk heads sit flush as expected. Will buy again.

5 FAQ

Q: Are these screws suitable for outdoor use?

A: These screws have a black oxide finish which offers some protection, but they are best suited for indoor applications. For outdoor use, we recommend stainless steel options to prevent rust.

Q: What is the length range of the M3 screws in this kit?

A: The M3 screws in this combination kit typically range from 6mm to 20mm in length, covering most standard assembly requirements.

Q: Can I buy just the M4 nuts separately?

A: Currently, these items are only available as part of the complete combination kit. We do not sell individual components separately at this time.

Q: Does the kit include a screwdriver?

A: No, this kit includes only the fasteners (screws, nuts, and washers). Tools are not included.

Q: Is the storage box resealable?

A: Yes, the kit comes in a sturdy plastic box with a snap-lock lid to keep your hardware organized and secure.

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