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Home / Screws / 304 Stainless Steel Cross Large Flat Head Screws Nuts Kit Umbrella Head Flat Bolts Round Head Flat Washers Spring Washers Combination

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Head Style Cross Large Flat Head / Umbrella Head
Drive Type Phillips (Cross)
Surface Finish Polished Silver
Corrosion Resistance High (Rust Resistant)
Included Components Screws, Nuts, Flat Washers, Spring Washers
Application General Construction, Machinery, DIY Projects
Thread Type Metric Coarse Thread
Package Type Assorted Kit Box
Durability Heavy Duty Industrial Grade

6 reviews

A

Anonymous

Mar 23, 2026

Rating: 5/5

Excellent quality stainless steel

These screws are exactly what I needed for my outdoor deck project. The 304 stainless steel feels very solid and hasn't shown any signs of rust after a few weeks of rain. The umbrella head looks clean and professional.

A

Anonymous

Mar 21, 2026

Rating: 5/5

Smooth threads and easy to drive

The cross head design grips the screwdriver bit very well, preventing cam-out even when tightening firmly. The threads cut smoothly into wood and metal without stripping. A must-have for any toolbox.

A

Anonymous

Mar 17, 2026

Rating: 5/5

Perfect for marine applications

Used these on a small boat repair. Since they are 304 grade, they handle the salt air environment much better than standard zinc-plated screws. Highly recommend for anyone working near water.

A

Anonymous

Mar 10, 2026

Rating: 4/5

Solid value for money

You get a lot of pieces for the price. The spring washers provide good tension. Some of the smaller nuts were a bit tight initially, but they loosened up after a few uses. Overall very satisfied.

A

Anonymous

Mar 08, 2026

Rating: 4/5

Great variety pack

Good assortment of sizes in the kit. The washers fit perfectly with the bolts. I deducted one star only because the plastic organizer box was slightly cracked upon arrival, but the hardware itself is perfect.

A

Anonymous

Mar 04, 2026

Rating: 5/5

Best seller for a reason

I can see why this is a best seller. The finish is uniform, there are no burrs on the edges, and the kit covers almost every size I need for general household repairs. Will definitely buy again.

5 FAQ

Q: What is the hardness rating of these bolts?

A: These are standard 304 stainless steel fasteners, typically having a tensile strength of approximately 500-700 MPa, which is suitable for most general construction and machinery applications.

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

A: Yes, being made of 304 stainless steel, they offer high corrosion resistance and are suitable for marine and coastal environments, though regular inspection is recommended for prolonged submersion.

Q: Does this kit include a storage case?

A: Yes, the combination kit comes in a durable compartmentalized plastic box to help you organize the different sizes of screws, nuts, and washers.

Q: Are the washers included flat or split lock washers?

A: The kit includes both round flat washers and spring (split lock) washers to ensure a secure fit and prevent loosening due to vibration.

Q: Can I use these with an electric impact driver?

A: Yes, the cross large flat head design is compatible with standard Phillips bits used in electric drivers. However, we recommend using a clutch setting to avoid over-tightening.

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